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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 102–111
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Simultaneous rotation, orientation and displacement control of birefringent microparticles in holographic optical tweezers

A. Arias, S. Etcheverry, P. Solano, J. P. Staforelli, M. J. Gallardo, H. Rubinsztein-Dunlop, and C. Saavedra  »View Author Affiliations


Optics Express, Vol. 21, Issue 1, pp. 102-111 (2013)
http://dx.doi.org/10.1364/OE.21.000102


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Abstract

We report the experimental implementation of a new method for generating multiple dynamical optical tweezers, where each one of them is generated with an independent linear polarization state with arbitrary orientation. This also allows an independent simultaneous polarization-rotation control. The laser beam, both for generating multiple traps and polarization control, has been modulated using a single reflective nematic liquid crystal with parallel alignment. We present experimental results of controlled displacement, orientation and rotation of birefringent particles. In addition, a simple method for estimating and canceling out the primary astigmatism present in the system is presented.

© 2013 OSA

1. Introduction

The radiation torque on a sphere produced by a circularly polarized field under different scattering conditions was studied by Marston and Crichton in reference [1

1. P. L. Marston and J. H. Crichton, “Radiation torque on a sphere caused by a circularly-polarized electromagnetic wave,” Phys. Rev. A 30, 2508–2516 (1984). [CrossRef]

]. The first observation of the transfer of orbital angular momentum to trapped absorbing particles was reported in reference [2

2. M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, and N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. 54, 1593–1596 (1996). [CrossRef]

]. This reference shows the rotation of CuO particle trapped due to the helical phase structure of the beam. The Laguerre-Gaussian (LG) mode has been used to transfer orbital angular momentum (OAM) to a trapped particle in an optical tweezer setup [3

3. N. B. Simpson, K. Dholakia, L. Allen, and M. J. Padgett, “Mechanical equivalence of spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997). [CrossRef] [PubMed]

], and the cancellation between spin and orbital angular momentum has been observed. It is known that electromagnetic waves transport spin angular momentum, which can be transferred to highly birefringent particles [4

4. M. E. J. Friese, T. A. Nieminen, N. R. Heckenberg, and H. Rubinsztein-Dunlop, “Optical alignment and spinning of laser-trapped microscopic particles,” Nature 394, 348–350 (1998). [CrossRef]

]. Recently, a simple synthesis and characterization of highly birefringent vaterite microspheres has been reported [5

5. S. J. Parkin, R. Vogel, M. Persson, M. Funk, V. L. Loke, T. A. Nieminen, N. R. Heckenberg, and H. Rubinsztein-Dunlop, “Highly birefringent vaterite microspheres: production, characterization and applications for optical micromanipulation,” Opt. Express 17, 21944–21955 (2009). [CrossRef] [PubMed]

]. Transfer of OAM and trapping of micro-rotors has been implemented using Laguerre-Gaussian beams [6

6. T. Asavei, V. L. Y. Loke, M. Barbieri, T. A. Nieminen, N. R. Heckenberg, and H. Rubinsztein-Dunlop, “Optical angular momentum transfer to microrotors fabricated by two-photon photopolymerization,” New J. Phys. 11, 1–20 (2009). [CrossRef]

]. Eriksen et al.[7

7. R. L. Eriksen, P. J. Rodrigo, V. R. Daria, and J. Glückstad, “Spatial light modulator-controlled alignment and spinning of birefringent particles optically trapped in an array,” Appl. Opt. 42, 5107–5111 (2003). [CrossRef] [PubMed]

] have controlled the orientation and rotation of birefringent particles using a spatial light modulator (SLM) for modifying the polarization and an array of four microlens generating four static optical tweezers. Recently, Preece et al.[8

8. D. Preece, S. Keen, E. Botvinick, R. Bowman, M. Padgett, and J. Leach, “Independent polarisation control of multiple optical traps,” Opt. Express 16, 15897–15902 (2008). [CrossRef] [PubMed]

] have reported a method for independent control of polarization in the case of dynamical optical tweezers. In this reference a twisted nematic liquid crystal display (TN-LCD) SLM was used.

As described in Ref. [9

9. J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77, 205–228 (2008). [CrossRef] [PubMed]

], much effort has been devoted to extend optical tweezers to the measurement of additional degrees of freedom, such as rotation. Hence, it is of great interest to find methods to control twist and measure torque while simultaneously measuring linear motion and force with the resolution of traditional optical tweezers. The first methods for providing controlled rotation into an optical tweezers were performed by adding a rotating micropipette [10

10. Z. Bryant, M. D. Stone, J. Gore, S. B. Smith, N. R. Cozzarelli, and C. Bustamante, “Structural transitions and elasticity from torque measurements on DNA,” Nature 424, 338341 (2003). [CrossRef]

, 11

11. M. D. Stone, Z. Bryant, N. J. Crisona, S. B. Smith, and A. Vologodskii, “Chirality sensing by Escherichia coli topoisomerase IV and the mechanism of type II topoisomerases,” Proc. Natl. Acad. Sci. USA 100, 8654–8659 (2003). [CrossRef] [PubMed]

]. The authors were able to induce twist on a molecule or molecules of DNA while simultaneously measuring force and extension of the molecule.

In this article, we report a new method for generating multiple dynamical optical tweezers, where each one of them is generated with an independent linear polarization state with arbitrary orientation. To codify both the diffractive elements and the polarization states, we make use of the approach described in Ref. [12

12. J. A. Davis, G. H. Evans, and I. Moreno, “Polarization-multiplexed diffractive optical elements with liquid-crystal displays,” Appl. Opt. 44, 4049–4052 (2005). [CrossRef] [PubMed]

], where the phase of the wavefront is modulated in one SLM, and a second one acts as a polarization rotator. However, we have employed a double incidence on a single reflective liquid crystal display (LCD), instead of using two of them. By a slight modification of the experimental setup, circular as well as elliptical polarization states can be generated. We would like to point out that our setup has been designed for a SLM based on nematic liquid crystal cells with parallel alignment (PAL-LCD). In general, PAL-LCD devices differ from TN-LCDs in not having a rotor effect on the incident light when adding a phase. In addition, a technical challenge when designing an experimental setup using PALs devices, compared to TN-LCD ones, is imposed by the constraint of using low incident angles, typically < 6°. Hence, the differences when producing polarization states at individual traps suggest the need to implement different algorithms for generating multiple optical tweezers.

In Ref. [8

8. D. Preece, S. Keen, E. Botvinick, R. Bowman, M. Padgett, and J. Leach, “Independent polarisation control of multiple optical traps,” Opt. Express 16, 15897–15902 (2008). [CrossRef] [PubMed]

], the laser beam was split into two beams for each half-area of a tilted SLM. The single pass by the phase modulator area adds two holograms with a phase difference S that determines the polarization state. The holograms for multiple traps are calculated by use of algorithm in Ref. [13

13. J. Liesener, M. Reicherter, T. Haist, and H.J. Tiziani, “Multi-functional optical tweezers using computer-generated holograms,” Opt. Commun. 185, 77–82 (2000). [CrossRef]

], which is based on the extraction of the argument from the complex sum of each hologram of an individual trap. The beams are mixed and the fields with orthogonal directions and local birefringence S are added. The S control permits them the polarization commutation [14

14. C. Maurer, A. Jesacher, S. Fürhapter, S. Bernet, and M. Ritsch-Marte, “Tailoring of arbitrary optical vector beams,” New J. Phys. 9, 78 (2007). [CrossRef]

]. In this way, the information of each trap was totally distributed in the whole half-area of the SLM, requiring an exhaustive pixel-to-pixel coincidence between the two modulated beams. On the other hand, the PAL-LCD does not offer the possibility of being tilted. Therefore, we opted for two serial stages: the phase modulation and the polarization rotator. Further, we have a random multiplexing for all holograms of the individual traps [15

15. M. Montes-Usategui, E. Pleguezuelos, J. Andilla, and E. Martín-Badosa, “Fast generation of holographic optical tweezers by random mask encoding of Fourier components,” Opt. Express 14, 2101–2107 (2006). [CrossRef] [PubMed]

]. This strategy allows us to have more tolerance for the coincidence between both the multiplexed hologram and the polarization mask.

This article has been organized as follows: In section 2, we describe the optical setup that allows both generation of multiple traps and control of polarization at individual traps. We also explain the method for correction of primary astigmatism in the whole setup. In section 3, we show some applications of the method for orientation, rotation and displacement of birefringent micro-particles. In section 4 we present our conclusions.

2. Setup description

The experiment for generating holographic optical tweezers (HOT) with independent polarization control includes several stages, which are shown in Fig. 1. A collimated and expanded laser beam is used as a source of highly coherent light. In the phase modulation stage, the wavefront is modified with a combination of diffractive optical elements and lenses for each trap, by randomly multiplexing the multiple capture points, following the procedure described in Ref. [15

15. M. Montes-Usategui, E. Pleguezuelos, J. Andilla, and E. Martín-Badosa, “Fast generation of holographic optical tweezers by random mask encoding of Fourier components,” Opt. Express 14, 2101–2107 (2006). [CrossRef] [PubMed]

]. The pixel size of the random mask contains 10 × 10 pixels of the SLM. Furthermore, a rotation plate, built up using the same phase modulation device, is used for controlling the polarization at the hologram areas where the traps are created [12

12. J. A. Davis, G. H. Evans, and I. Moreno, “Polarization-multiplexed diffractive optical elements with liquid-crystal displays,” Appl. Opt. 44, 4049–4052 (2005). [CrossRef] [PubMed]

]. A telescope couples the laser beam with both phase and polarization information over the microscope objective with high numerical aperture (NA), thus generating multiple traps at the focal plane of the microscope objective (or sample plane), where each one of the traps possesses independent polarization information.

Fig. 1 A schematic diagram of the stages employed for generation of multiple holographic optical traps with independent control of polarization states.

Fig. 2 Experimental setup with double incidence in a single SLM for both phase (A) and polarization (B) control. An example of masks for the creation of two tweezers with rotated states of polarization allows one to observe random distribution displayed at masks A and B.

Using an interactive program, dynamical manipulation and visualization of multiple traps was performed, including polarization control as well as partial compensation of aberrations. The maximum power measured at the plane of the sample was 18 mW, namely, approximately 15% of the laser power. The minimum power that we tested was 3.1 mW at the plane of the sample and the system still worked. In the following section we explain the procedure employed for the orientation of linear polarization and the strategy used for estimating and compensating the astigmatism in the setup.

2.1. Combined polarization and holographic control

Davis et al. in Ref. [12

12. J. A. Davis, G. H. Evans, and I. Moreno, “Polarization-multiplexed diffractive optical elements with liquid-crystal displays,” Appl. Opt. 44, 4049–4052 (2005). [CrossRef] [PubMed]

] have shown that a retardation plate can be built up using a LCD-PAL (see the B region in SLM in Fig. 2) located between two QWPs oriented to a −π/4 and a π/4 rad in relation to the crystal director axis. Thus, we can control the phase and polarization of the wavefront using a double pass throughout a single LCD device. In the Jones formalism, the effective system formed by this kind of LCD and two QWPs is represented by:
MRot=R(π/4)(100i)R(π/4)(100exp(iϕ))R(π/4)(100i)R(π/4),
(1)
where MRot denotes the effective programable retardation plates depending on the grey level displayed at the SLM. R(χ) is the rotation matrix and ϕ is the phase added by the SLM. The Eq. (1) can be expressed as [12

12. J. A. Davis, G. H. Evans, and I. Moreno, “Polarization-multiplexed diffractive optical elements with liquid-crystal displays,” Appl. Opt. 44, 4049–4052 (2005). [CrossRef] [PubMed]

]:
MRot=iexp{iϕ2}R(ϕ2).
(2)

In the above expression, the direct dependence of the rotation angle of an incident polarization state on ϕ is clear, allowing an approximated rotation interval of 1.1π rad. Furthermore, an additional phase is added to the rotation, which must be compensated at A region of the SLM. In the sample plane, the measurement of the Stokes parameters [20

20. R. A. Chipman, “Polarimetry,” in Handbook of Optics, (McGraw-Hill, New York, 1994) Chap 22.

] was used to estimate the change of polarization orientation by displaying the gray levels at the LCD. The results are depicted in Fig. 3. We implemented standard polarimetry for determining the response of the SLM when used as a programable retardation plate. That is, we add a QWP and a polarizer at the sample plane, and they were configured for polarization analysis. This allows us to obtain the Stokes parameters by measuring the power at the sample plane as a function of the grey level displayed at the SLM.

Fig. 3 Polarization states as a function of gray level displayed at the LCD acting as a rotator. A strong lineal dependence exists between the rotation angle and gray levels. Nonetheless, for intermediate gray levels the polarization ellipses show a slight decrease of their flattening.

Both to verify the degree of coincidence of regions in A and B at the SLM and to show the rotation of polarization in the illuminated area, a modification of the experimental setup was implemented (see Fig. 2): A linear polarizer was inserted between lens L4 and the dichroic mirror, and the images at the SLMs pupil image (just before the microscope objective) were registered. The expected result is that the limiting regions of the holograms randomly distributed coincide with the dark zone due to the absorption of the polarizer where there is no horizontal polarization. In Fig. 4 phase and polarization masks are depicted, where the whole illuminated area of the SLM by the expanded laser beam can be observed. In this figure, for visualization purposes, we depict whole masks where each pixel contains 40 × 40 pixels of the SLM. We selected these masks for visualization purposes only. In the experiments we used mask with pixels of 10 × 10 SML’s pixels and masks with good functioning up to 5 × 5 SLM’s pixels were tested. However, in our case, to overcame the needs of a high precision alignment we used larger pixels at the masks. The quality of the masks is enhanced by reducing the size of the pixels, however this increases the difficulty when aligning masks at regions A and B of the SLM. The coincidence of the masks ensures that each trap only has the programmed polarization state through the implementation of the user interface.

Fig. 4 Images of both the phase and the polarization masks at the SLMs pupil, right before the entrance at the microscope objective for generating (a) two and (b) three traps. A linear polarizer was inserted in order to darken zones with rotated polarization. The red bar is the scale length, of 120 pixels of the SLM, approximately 972 μm.

We used the random mask algorithm because it is required that each trap is spatially well defined, where each pixel of the mask has information of a single trap. This allows to make that the image of each pixel of the mask over the corresponding one in the polarization mask, so that polarization of the trap can be controlled by varying the grey level assigned to those pixels. Usually, for holographic optical tweezers the used algorithm is the lens and grating. In this last case the masks are generated as a superposition of the diffractive optical elements from different traps, namely, each pixel has information of all the traps and consequently it can not be assigned a specific grey level for controlling the polarization of a given trap.

2.2. Improvement of the aberrations state

The compensation of static aberrations in the whole setup was focused on the estimation and cancellation of the astigmatism by using an LG beam programmed in the SLM [19

19. A. Jesacher, A. Schwaighofer, S. Fürhapter, C. Maurer, S. Bernet, and M. Ritsch-Marte, “Wavefront correction of spatial light modulators using an optical vortex image,” Opt. Express 15, 5801–5808 (2007). [CrossRef] [PubMed]

]. This can be done by displaying in the A area of the SLM several phase maps given by:
φ(r,θ)=mθ+c22Z22+c2+2Z2+2,
(3)
where (r,θ) are polar coordinates; m is the vortex topological charge; Z22 and Z2+2 are second order Zernike polynomials for primary astigmatism and c22yc2+2 are their coefficients, respectively. In addition, in the plane of the sample (see Fig. 2) a mirror was located for obtaining the deformed vortex image. The spectral filter of the camera was removed for better acquisition of the reflection in the mirror. The processing of each image of the LG beam consists in fitting its binary version to an ellipsoidal geometry, where the eccentricity determine the value of a normalized quality function. In this way, a zero value of that function means total symmetry of the beam. The set of measurements allows to generate a quality function surface in terms of c22yc2+2 coefficients. From these maps, the parameter combination that minimizes the quality function value can be found. In addition, a further improvement of the beam quality can be achieved by exploring the parameter space around the values that minimize the first search.

A test for astigmatism correction was done using the technique above described. Figure 5 (a) shows the quality function surface through an initial set of values of second order Zernike coefficients. Once the coefficients corresponding to the lowest quality function value is determined, then a restricted area around these coefficients is inspected and the new surface is shown in Fig. 5(b). Hence, the minimum of the second surface gives the coefficients c22 (≈ 2.89 rad) and c2+2 (≈ 0.79 rad) that cancel out the astigmatism in the plane of the sample.

Fig. 5 Surface maps depicting quality function. This function gives a measure of the symmetry properties of the vortex. (b) Zoom of quality function around the region marked with a dashed line in (a).

The beam quality improvement visualized on the LG beams (with m equivalent to 1) and point spread function (PSF) are shown in Fig. 6. The presence of astigmatism in the case of non compensated vortex is noticeable, which can be compared with the results obtained by Kumar Singh et al. in Ref. [22

22. R. K. Singh, P. Senthilkumaran, and K. Singh, “Influence of astigmatism and defocusing on the focusing of a singular beam,” Opt. Commun. 270, 128–138 (2007). [CrossRef]

]. Although the LG beam symmetry was recovered, the compensated PSF reveals that the higher order aberrations are still slightly disturbing the beam quality, this does not have a large effect on the generated traps. Also, larger order Zernike polynomials can be included for further improvement of the beam quality.

Fig. 6 Comparison of the vortex used without (a) and with (b) astigmatism correction. Likewise, aberrated (c) and partially compensated (d) PSFs are shown. The images are the negative version of the acquired ones.

3. Experimental results

In this study, the preparation method, for generating asymmetric birefringent particles, was as follows: We ground an Argopecten purpuratus shell, approximately 20 mg. This grounded powder was resuspended in 1000 μL of Millipore-Q water. We added 100 μL of a solution of 5% Triton X-100 to stabilize the sample. The mixture was strongly agitated using a Pasteur pipet or vortex. To eliminate larger particles, the sample was centrifuged at 100 rpm for 10 minutes. We selected particles of a size of approximately 4 μm, due to the fact that these birefringent particles are non spherical an easy to visualize of both the spatial mobility of the HOT and the torque effects on alignment and gyration when using linear and circular polarization is obtained. Two experiments were performed to verify the functionality of the stages of our proposal. The main reason for using ground powder of the Argopecten purpuratus shell is simply to have non symmetric birefringent particles, which allows us to easily visualize of the control of orientation, as well as the rotations of these particles. For other uses, it is better to employ birefringente vaterite microparticles.

Firstly, we controlled the orientation angle of a single particle using the interactive application, the results of which are depicted in Fig. 7. This test is consistent with the characterization of the SLM acting as a programmable retardation plate, see Fig. 3.

Fig. 7 Sequence of the induced rotations on birefringent particles of ( Media 1).

Secondly, we tested the independent control of polarization control. Two particles were trapped with horizontal and circular polarization. While one particle was rotating, another one was moved and returned to its initial position. In Fig. 8, the route of movements is indicated. The rotation of birefringent objects can also be done inserting a QWP after L4 lens in the experimental setup shown in the Fig. 2. In this case, the trap is programmed with linearly polarized orthogonal states and the QWP is oriented at π/4 in respect to one of those polarization directions.

Fig. 8 Route of programmed movements for two birefringent particles. (a) The two particles are rotating in opposite directions, while one is kept in a fixed position the other one is displaced ( Media 2). (b) In fixed positions, the same birefringent particles are rotating in opposite senses and later the rotation of the right hand side particle is switched to the same sense of the other. ( Media 3).

4. Conclusions

We have presented a new experimental configuration for the generation of multiple dynamical holographic optical traps, with independent control of linear polarization states at each trap. Furthermore, through a slight modification of the configuration, circularly polarized states can be generated, which are used in rotation of birefringent particles. In this way, we can access two no-simultaneous sets of polarization states: linear with several orientations and another that includes horizontal, vertical, left-handed and right-handed circular states. The experimental setups proposed in Refs. [7

7. R. L. Eriksen, P. J. Rodrigo, V. R. Daria, and J. Glückstad, “Spatial light modulator-controlled alignment and spinning of birefringent particles optically trapped in an array,” Appl. Opt. 42, 5107–5111 (2003). [CrossRef] [PubMed]

] and [8

8. D. Preece, S. Keen, E. Botvinick, R. Bowman, M. Padgett, and J. Leach, “Independent polarisation control of multiple optical traps,” Opt. Express 16, 15897–15902 (2008). [CrossRef] [PubMed]

] have also access two no-simultaneous sets of polarization states. Although recently in Ref. [23

23. F. Kenny, D. Lara, O. G. Rodríguez-Herrera, and C. Dainty, “Complete polarization and phase control for focus-shaping in high-NA microscopy,” Opt. Express 20, 14015–14029 (2012). [CrossRef] [PubMed]

] a complete polarization control for replicate any state (plane, elliptical or circular) has been shown, it requires a third pass by a SLM, which could affect the trap stiffness. Moreover, a simple non-iterative strategy was introduced and applied for primary astigmatism cancellation at the experimental setup. By inserting a quarter-wave plate before the dichroic mirror simultaneously circular or linear (horizontal and vertical) polarization states can be programmed.

Even when the random mask algorithm is less efficient when a large number of traps is generated, the main limitation for the number of traps that can be generated is the laser power. By increasing the power or using an infrared laser instead of the red one, a large increase in the number of traps can be attained. Due to both the large size of the ground powder of the Argopecten purpuratus shell and the wavelength used, there are limitation on the number of trapped particles. However, this number can be easily increased by using vaterite microparticles and an infrared laser. Actually we observed up to six rotating trapped particles, but in such a case it is not possible to observe the orientation features due to the symmetry of the particles.

The ability to create multiple optical traps with independently controlled polarization is of substantial importance for several interesting biomedical applications as well as in microfluidics devices. As demonstrated in Ref. [24

24. S. Keen, A. Yao, J. Leach, R. Di Leonardo, C. Saunter, G. Love, J. M. Cooper, and M. Padgett, “Multipoint viscosity measurements in microfluidic channels using optical tweezers,” Lab. on a Chip 9, 2059–2062 (2009). [CrossRef] [PubMed]

], these multiple traps may be used for a construction of micropumps allowing for simultaneous optical micromanipulation, actuation and sensing. For that purpose, having the traps with independent polarization enables precise measurements of optical torques and forces without having to deal possible interference between the trap beams. When using SLM for the creation of these traps with controlled polarization state, as described in our work, the pump presented in the previously mentioned paper can be vastly expanded and provide guidance on a much larger scale.

Another area of applications where these types of traps will be of importance is in biomedicine. In a recent work by Wu et al.[25

25. T. Wu, T. A. Nieminen, S. Mohanty, J. Miotke, R. L. Meyer, H. Rubinsztein-Dunlop, and M. W. Berns, “A photon-driven micromotor can direct nerve fibre growth,” Nature Photon. 6, 62–67 (2012). [CrossRef]

] an optically-based system based on the laser-driven rotation spheres has been developed to control the direction of growth of individual axons. This helps to unravel axonal path-finding which is important in the development of the nervous system, nerve repair and nerve regeneration. By using the rotating particles one can create a localized microfluidic flow generating shear force against the growth cone. This force can be determined quantitatively. Moreover having a HOT system with independent control of polarization could vastly enable a broadened quantitative study of the direction of axon growth.

The development of a holographic optical tweezer setup with independent control of polarization and position is the first step for the evaluation of protein chains. In particular, we are interested in studying the effect of UV radiation on DNA chains. As described in Goodsell in [26

26. D.S. Goodsell, “The Molecular Perspective: Ultraviolet Light and Pyrimidine Dimers,” Stem Cells 19, 348349 (2001). [CrossRef]

], the UV radiation can produce in the DNA molecules the conversion of Timin-Citozin in Timin dimers. This modification at the molecular structure will affect the mechanical properties, which can be studied using the optical tweezers technique [27

27. F. M. Fazal and S. M. Block, “Optical tweezers study life under tension,” Nature Photon. 5, 318–321 (2011). [CrossRef]

, 28

28. C. Bustamante, “Of torques, forces, and protein machines,” Prot. Sci. 13, 3061–3065 (2004). [CrossRef]

].

Acknowledgments

This work was partially supported by CONICYT Grant PFB0824. A. Arias is grateful to Enlaza-Mundos 2011 mobility program from the Medellin Municipality (Colombia). J.P. Staforelli acknowledges support from FONDECYT 11110145. S. Etcheverry acknowledges partial support from CONICYT scholarships.

References and links

1.

P. L. Marston and J. H. Crichton, “Radiation torque on a sphere caused by a circularly-polarized electromagnetic wave,” Phys. Rev. A 30, 2508–2516 (1984). [CrossRef]

2.

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, and N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. 54, 1593–1596 (1996). [CrossRef]

3.

N. B. Simpson, K. Dholakia, L. Allen, and M. J. Padgett, “Mechanical equivalence of spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997). [CrossRef] [PubMed]

4.

M. E. J. Friese, T. A. Nieminen, N. R. Heckenberg, and H. Rubinsztein-Dunlop, “Optical alignment and spinning of laser-trapped microscopic particles,” Nature 394, 348–350 (1998). [CrossRef]

5.

S. J. Parkin, R. Vogel, M. Persson, M. Funk, V. L. Loke, T. A. Nieminen, N. R. Heckenberg, and H. Rubinsztein-Dunlop, “Highly birefringent vaterite microspheres: production, characterization and applications for optical micromanipulation,” Opt. Express 17, 21944–21955 (2009). [CrossRef] [PubMed]

6.

T. Asavei, V. L. Y. Loke, M. Barbieri, T. A. Nieminen, N. R. Heckenberg, and H. Rubinsztein-Dunlop, “Optical angular momentum transfer to microrotors fabricated by two-photon photopolymerization,” New J. Phys. 11, 1–20 (2009). [CrossRef]

7.

R. L. Eriksen, P. J. Rodrigo, V. R. Daria, and J. Glückstad, “Spatial light modulator-controlled alignment and spinning of birefringent particles optically trapped in an array,” Appl. Opt. 42, 5107–5111 (2003). [CrossRef] [PubMed]

8.

D. Preece, S. Keen, E. Botvinick, R. Bowman, M. Padgett, and J. Leach, “Independent polarisation control of multiple optical traps,” Opt. Express 16, 15897–15902 (2008). [CrossRef] [PubMed]

9.

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77, 205–228 (2008). [CrossRef] [PubMed]

10.

Z. Bryant, M. D. Stone, J. Gore, S. B. Smith, N. R. Cozzarelli, and C. Bustamante, “Structural transitions and elasticity from torque measurements on DNA,” Nature 424, 338341 (2003). [CrossRef]

11.

M. D. Stone, Z. Bryant, N. J. Crisona, S. B. Smith, and A. Vologodskii, “Chirality sensing by Escherichia coli topoisomerase IV and the mechanism of type II topoisomerases,” Proc. Natl. Acad. Sci. USA 100, 8654–8659 (2003). [CrossRef] [PubMed]

12.

J. A. Davis, G. H. Evans, and I. Moreno, “Polarization-multiplexed diffractive optical elements with liquid-crystal displays,” Appl. Opt. 44, 4049–4052 (2005). [CrossRef] [PubMed]

13.

J. Liesener, M. Reicherter, T. Haist, and H.J. Tiziani, “Multi-functional optical tweezers using computer-generated holograms,” Opt. Commun. 185, 77–82 (2000). [CrossRef]

14.

C. Maurer, A. Jesacher, S. Fürhapter, S. Bernet, and M. Ritsch-Marte, “Tailoring of arbitrary optical vector beams,” New J. Phys. 9, 78 (2007). [CrossRef]

15.

M. Montes-Usategui, E. Pleguezuelos, J. Andilla, and E. Martín-Badosa, “Fast generation of holographic optical tweezers by random mask encoding of Fourier components,” Opt. Express 14, 2101–2107 (2006). [CrossRef] [PubMed]

16.

J. L. Harriman, A. Linnenberger, and S. A. Serati, “Improving spatial light modulator performance through phase compensation,” Proc. SPIE 5553, 58 (2004). [CrossRef]

17.

K. D. Wulff, D. G. Cole, R. L. Clark, R. DiLeonardo, J. Leach, J. Cooper, G. Gibson, and M. J. Padgett, “Aberration correction in holographic optical tweezers,” Opt. Express 14, 4170–4175 (2006). [CrossRef] [PubMed]

18.

R. S. Dutra, N. B. Viana, P. A. Maia Neto, and H. M. Nussenzveig, “Absolute calibration of optical tweezers including aberrations,” Apl. Phys. Lett. 100, 1311151 (2012). [CrossRef]

19.

A. Jesacher, A. Schwaighofer, S. Fürhapter, C. Maurer, S. Bernet, and M. Ritsch-Marte, “Wavefront correction of spatial light modulators using an optical vortex image,” Opt. Express 15, 5801–5808 (2007). [CrossRef] [PubMed]

20.

R. A. Chipman, “Polarimetry,” in Handbook of Optics, (McGraw-Hill, New York, 1994) Chap 22.

21.

C. López-Quesada, J. Andilla, and E. Martín-Badosa, “Correction of aberration in holographic optical tweezers using a ShackHartmann sensor,” Appl. Opt. 48, 1084–1090 (2009). [CrossRef]

22.

R. K. Singh, P. Senthilkumaran, and K. Singh, “Influence of astigmatism and defocusing on the focusing of a singular beam,” Opt. Commun. 270, 128–138 (2007). [CrossRef]

23.

F. Kenny, D. Lara, O. G. Rodríguez-Herrera, and C. Dainty, “Complete polarization and phase control for focus-shaping in high-NA microscopy,” Opt. Express 20, 14015–14029 (2012). [CrossRef] [PubMed]

24.

S. Keen, A. Yao, J. Leach, R. Di Leonardo, C. Saunter, G. Love, J. M. Cooper, and M. Padgett, “Multipoint viscosity measurements in microfluidic channels using optical tweezers,” Lab. on a Chip 9, 2059–2062 (2009). [CrossRef] [PubMed]

25.

T. Wu, T. A. Nieminen, S. Mohanty, J. Miotke, R. L. Meyer, H. Rubinsztein-Dunlop, and M. W. Berns, “A photon-driven micromotor can direct nerve fibre growth,” Nature Photon. 6, 62–67 (2012). [CrossRef]

26.

D.S. Goodsell, “The Molecular Perspective: Ultraviolet Light and Pyrimidine Dimers,” Stem Cells 19, 348349 (2001). [CrossRef]

27.

F. M. Fazal and S. M. Block, “Optical tweezers study life under tension,” Nature Photon. 5, 318–321 (2011). [CrossRef]

28.

C. Bustamante, “Of torques, forces, and protein machines,” Prot. Sci. 13, 3061–3065 (2004). [CrossRef]

OCIS Codes
(220.1000) Optical design and fabrication : Aberration compensation
(230.5440) Optical devices : Polarization-selective devices
(230.6120) Optical devices : Spatial light modulators
(260.5430) Physical optics : Polarization
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

History
Original Manuscript: October 11, 2012
Revised Manuscript: November 26, 2012
Manuscript Accepted: November 29, 2012
Published: January 2, 2013

Virtual Issues
Vol. 8, Iss. 2 Virtual Journal for Biomedical Optics

Citation
A. Arias, S. Etcheverry, P. Solano, J. P. Staforelli, M. J. Gallardo, H. Rubinsztein-Dunlop, and C. Saavedra, "Simultaneous rotation, orientation and displacement control of birefringent microparticles in holographic optical tweezers," Opt. Express 21, 102-111 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-1-102


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References

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  11. M. D. Stone, Z. Bryant, N. J. Crisona, S. B. Smith, A. Vologodskii, and , “Chirality sensing by Escherichia coli topoisomerase IV and the mechanism of type II topoisomerases,” Proc. Natl. Acad. Sci. USA100, 8654–8659 (2003). [CrossRef] [PubMed]
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  14. C. Maurer, A. Jesacher, S. Fürhapter, S. Bernet, and M. Ritsch-Marte, “Tailoring of arbitrary optical vector beams,” New J. Phys.9, 78 (2007). [CrossRef]
  15. M. Montes-Usategui, E. Pleguezuelos, J. Andilla, and E. Martín-Badosa, “Fast generation of holographic optical tweezers by random mask encoding of Fourier components,” Opt. Express14, 2101–2107 (2006). [CrossRef] [PubMed]
  16. J. L. Harriman, A. Linnenberger, and S. A. Serati, “Improving spatial light modulator performance through phase compensation,” Proc. SPIE5553, 58 (2004). [CrossRef]
  17. K. D. Wulff, D. G. Cole, R. L. Clark, R. DiLeonardo, J. Leach, J. Cooper, G. Gibson, and M. J. Padgett, “Aberration correction in holographic optical tweezers,” Opt. Express14, 4170–4175 (2006). [CrossRef] [PubMed]
  18. R. S. Dutra, N. B. Viana, P. A. Maia Neto, and H. M. Nussenzveig, “Absolute calibration of optical tweezers including aberrations,” Apl. Phys. Lett.100, 1311151 (2012). [CrossRef]
  19. A. Jesacher, A. Schwaighofer, S. Fürhapter, C. Maurer, S. Bernet, and M. Ritsch-Marte, “Wavefront correction of spatial light modulators using an optical vortex image,” Opt. Express15, 5801–5808 (2007). [CrossRef] [PubMed]
  20. R. A. Chipman, “Polarimetry,” in Handbook of Optics, (McGraw-Hill, New York, 1994) Chap 22.
  21. C. López-Quesada, J. Andilla, and E. Martín-Badosa, “Correction of aberration in holographic optical tweezers using a ShackHartmann sensor,” Appl. Opt.48, 1084–1090 (2009). [CrossRef]
  22. R. K. Singh, P. Senthilkumaran, and K. Singh, “Influence of astigmatism and defocusing on the focusing of a singular beam,” Opt. Commun.270, 128–138 (2007). [CrossRef]
  23. F. Kenny, D. Lara, O. G. Rodríguez-Herrera, and C. Dainty, “Complete polarization and phase control for focus-shaping in high-NA microscopy,” Opt. Express20, 14015–14029 (2012). [CrossRef] [PubMed]
  24. S. Keen, A. Yao, J. Leach, R. Di Leonardo, C. Saunter, G. Love, J. M. Cooper, and M. Padgett, “Multipoint viscosity measurements in microfluidic channels using optical tweezers,” Lab. on a Chip9, 2059–2062 (2009). [CrossRef] [PubMed]
  25. T. Wu, T. A. Nieminen, S. Mohanty, J. Miotke, R. L. Meyer, H. Rubinsztein-Dunlop, and M. W. Berns, “A photon-driven micromotor can direct nerve fibre growth,” Nature Photon.6, 62–67 (2012). [CrossRef]
  26. D.S. Goodsell, “The Molecular Perspective: Ultraviolet Light and Pyrimidine Dimers,” Stem Cells19, 348349 (2001). [CrossRef]
  27. F. M. Fazal and S. M. Block, “Optical tweezers study life under tension,” Nature Photon.5, 318–321 (2011). [CrossRef]
  28. C. Bustamante, “Of torques, forces, and protein machines,” Prot. Sci.13, 3061–3065 (2004). [CrossRef]

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