OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  •  

Optics InfoBase > JOSA B > Early Posting

Early Posting

Accepted papers to appear in an upcoming issue

OSA now posts prepublication articles as soon as they are accepted and cleared for production. See the FAQ for additional information.

Articles 1 to 20 of 29 Next Page >>

April


Pulse propagation in one-dimensional disordered photonic crystals: Interplay of disorder with instantaneous and relaxing nonlinearities

  • D. Novitsky
  • received 01/16/2014; accepted 04/16/2014; posted 04/17/2014; Doc. ID 204822
  • [full text: PDF (1009) KB)]
  • Abstract: Propagation of ultrashort light pulses in disordered multilayers is studied by using numerical simulations in time domain. We consider cases of instantaneous and noninstantaneous Kerr nonlinearities of the structure materials. The competitive nature of disorder and nonlinearity is revealed on the long and short timescales. We also pay special attention to the effect of pulse self-trapping in the photonic crystal with relaxing nonlinearity and show the dependence of this effect on the level of disorder.

Keywords (OCIS):

  • (000.4430) General : Numerical approximation and analysis
  • (190.5530) Nonlinear optics : Pulse propagation and temporal solitons
  • (190.7110) Nonlinear optics : Ultrafast nonlinear optics
  • (050.5298) Diffraction and gratings : Photonic crystals

Optical switching using controlled two-photon transition

  • Chin-Chun Tsai, Yi-Chi Lee, and Hsiang-Chen Chui
  • received 11/25/2013; accepted 04/15/2014; posted 04/15/2014; Doc. ID 201930
  • [full text: PDF (638) KB)]
  • Abstract: New scheme of a real-time all-optical switching (AOS) was demonstrated as the florescence signal of cesium two-photon transition (TPT) with the control field. This work explored the optical phenomenon of the TPT with the control field that shares a common excited state, in which the TPT fluorescence quenched under the control field intensity. The strong stimulated emission due to the control laser suppresses the TPT florescence, working as an optical switch. A “NOT gate” is generated for realization of AOS. The power spectrum of the intensity range which can be used for the AOS is determined.

Keywords (OCIS):

  • (020.1670) Atomic and molecular physics : Coherent optical effects
  • (020.4180) Atomic and molecular physics : Multiphoton processes
  • (300.6210) Spectroscopy : Spectroscopy, atomic

Power quantum control of odd-order multi-wave mixing in electromagnetically induced transparency window

  • Ning Li, Zhaoyang Zhang, Zhenkun Wu, Chengjun Lei, Yiqi Zhang, Yanpeng Zhang, and Huaibin Zheng
  • received 01/17/2014; accepted 04/15/2014; posted 04/15/2014; Doc. ID 204910
  • [full text: PDF (1567) KB)]
  • Abstract: We investigate the power control behavior of odd-order multi-wave mixing in electromagnetically induced transparency window. We successfully obtain the evolution from pure-enhancement (bright state), half-enhancement and half-suppression, to pure-suppression (dark state) in four-wave mixing (FWM) channel. The interactions of two bright and two dark states of FWM are studied under four different kinds of power configurations. Moreover, the power-controlled quantum interference among multiple dark states is also studied in FWM and six-wave mixing channels. Such selective switching among multiple frequency channels could have potential applications in optical switching, optical communication and quantum information processing.

Keywords (OCIS):

  • (020.1670) Atomic and molecular physics : Coherent optical effects
  • (030.1670) Coherence and statistical optics : Coherent optical effects
  • (190.4223) Nonlinear optics : Nonlinear wave mixing

The phase state and related nonlinear coherent states

  • B. Rodríguez-Lara, F. Soto-Eguibar, and H. Moya-Cessa
  • received 02/11/2014; accepted 04/11/2014; posted 04/15/2014; Doc. ID 206329
  • [full text: PDF (263) KB)]
  • Abstract: We cast the phase state as a $SU(1,1)$ nonlinear coherent state to support the idea that the $SU(1,1)$ representation of the electromagnetic field may be helpful in some instances and to bring forward that it may relate to the phase state problem. We also construct nonlinear coherent states related to the exponential phase operator and provide their corresponding nonlinear annihilation operators. Finally, we discuss the propagation of classical fields through arrays of coupled waveguides that are solved through the use of nonlinear coherent states of $SU(1,1)$ or the exponential phase operator.

Keywords (OCIS):

  • (230.7370) Optical devices : Waveguides
  • (270.0270) Quantum optics : Quantum optics
  • (270.5580) Quantum optics : Quantum electrodynamics

(SLI) Topological Structures in Vector-vortex Beam Fields

  • Vijay Kumar and Nirmal Viswanathan
  • received 01/29/2014; accepted 04/10/2014; posted 04/10/2014; Doc. ID 205726
  • [full text: PDF (3117) KB)]
  • Abstract: Optical singularities of index I_u=±1/2 associated with lemon, monstar and star topological structures in π-symmetric fields and singularities of index I_c=±1 associated with radial, circulation (elliptic), spiral, node and saddle structures in 2π-symmetric vector fields are studied in detail here. The topological structures in polarization ellipse orientation field, Stokes field and Poynting vector field are derived from the same vector-vortex beam fields and their interdependencies are explored using a designed experimental setup. We find that the inherently stable topological approach is much more informative for a deeper understanding of complex vector-vortex beam fields.

Keywords (OCIS):

  • (260.3160) Physical optics : Interference
  • (260.5430) Physical optics : Polarization
  • (260.6042) Physical optics : Singular optics

Coherence properties of coupled optomechanical cavities

  • T. Figueiredo Roque and A. Vidiella-Barranco
  • received 01/24/2014; accepted 04/08/2014; posted 04/09/2014; Doc. ID 205385
  • [full text: PDF (1403) KB)]
  • Abstract: In this work we investigate an optomechanical system consisting of two cavities coupled to the same mechanical resonator. We consider each cavity being weakly pumped as well as a small tunneling rate between the cavities. In such conditions, the system can be studied via quantum Langevin equations and the steady state solution can be found perturbatively. In order to ensure that the approximations and methods used to study the system are suitable, the analytical results were compared to numerical simulations. We study the statistical properties of the cavity radiation fields and we show that depending on the values of the parameters of the system, it is possible to modify the spectrum of the cavities and even enhance the sub-Poissonian character of the cavity field.

Keywords (OCIS):

  • (270.0270) Quantum optics : Quantum optics
  • (270.5290) Quantum optics : Photon statistics
  • (120.4880) Instrumentation, measurement, and metrology : Optomechanics

Artificial Gauge Potentials for Neutral Atoms: An Application in Evanescent Light Fields

  • V. Lembessis
  • received 12/16/2013; accepted 04/08/2014; posted 04/17/2014; Doc. ID 202775
  • [full text: PDF (3701) KB)]
  • Abstract: We show that atoms interacting with evanescent light fields, generated at the interface of a dielectric with vacuum, experience artificial gauge potentials. These potentials depend crucially on the physical parameters which characterize the evanescent fields most notably the refractive index of the dielectric material and the angle of incidence of the laser beam totally internaly reflected at the interface. Gauge fields are derived for various evanescent light fields and for both two-level and three-level systems. The use of such artificial gauge potentials for the manipulation of atoms trapped at the interfaces is pointed out and discussed.

Keywords (OCIS):

  • (020.0020) Atomic and molecular physics : Atomic and molecular physics
  • (270.0270) Quantum optics : Quantum optics
  • (270.1670) Quantum optics : Coherent optical effects
  • (270.5580) Quantum optics : Quantum electrodynamics
  • (020.3320) Atomic and molecular physics : Laser cooling

Low-frequency photonic bands in square Mediterranean and hexagonal snowflake metallic structures

  • Kang Wang
  • received 03/04/2014; accepted 04/07/2014; posted 04/15/2014; Doc. ID 207640
  • [full text: PDF (1567) KB)]
  • Abstract: We study the low frequency photonic band structures in square Mediterranean and hexagonal snowflake metallic structures, both constructed upon two sets of adjustable tiles. The band formation and evolution are comparatively investigated with respect to local resonances and their variations following the modulations of the tile sizes and shapes. We show that the lowest frequency bands are formed by s-like resonance modes sustained by the structure tiles, of which the contributions vary following local structure modulations, and, under certain conditions, the second bands (above the first photonic band gaps) are formed by p-like modes sustained by the same tiles. The s and p bands can both be described in the frame work of a tight binding model, allowing band structure analyses in terms of relations between local resonance modes and their mutual correlations. In this schema, the plasma gaps and the first photonic band gaps arise naturally from local structure patterns, that determine both the local resonance conditions and their correlation relations.

Keywords (OCIS):

  • (160.5293) Materials : Photonic bandgap materials
  • (160.5298) Materials : Photonic crystals

Sub-wavelength Imaging with Composite Metamaterials

  • Szabo Zsolt, Yasaman Kiasat, and Er Ping Li
  • received 02/05/2014; accepted 04/07/2014; posted 04/09/2014; Doc. ID 205519
  • [full text: PDF (499) KB)]
  • Abstract: After reviewing the requirements, which has to be satisfied by a metamaterial based sub-wavelength imaging systems a thin films lens is reported herein. The material of the lens is a composite of spherical Ag nanoparticles embedded in SiO$_2$ host material. The image of the lens is calculated, by solving the Maxwell equations, with the Transfer Matrix method. The procedure applies Maxwell-Garnet mixing rule and high frequency effective medium theory to calculate the electromagnetic parameters of the composite material. The formula of the composite material, the optimum working frequency and the thicknesses of the layers are determined by minimizing the absolute difference of the field distribution in the source and image planes. The details of the design procedure are presented and optimized configurations obtained under different constrains are discussed. The main advantage of the composite lens is that it can eliminate the hotspots present in the images of metallic superlens.

Keywords (OCIS):

  • (110.2990) Imaging systems : Image formation theory
  • (160.3918) Materials : Metamaterials
  • (310.6628) Thin films : Subwavelength structures, nanostructures
  • (310.6805) Thin films : Theory and design

SHG of ultrashort pulses in refractive-index-linear-modulating nonlinear crystals

  • Liu Yang Zhang, Yu Jiang Liu, Jin Jer Huang, Shao Zhi Pu, and Zhong Ying Yang
  • received 01/13/2014; accepted 04/07/2014; posted 04/07/2014; Doc. ID 204595
  • [full text: PDF (1574) KB)]
  • Abstract: We present a theoretical model to deal with second harmonic generation (SHG) of ultrashort pulses in refractive-index-linear-modulating (RILM) nonlinear crystals. New coupled-wave equations are derived based on plane-wave propagation. Under the undepleted-pump approximation, the analytic solutions for SHG of ultrashort pulses are obtained. The optimization of second harmonic (SH) pulse width and efficiency on RILM parameter and chirp coefficient of fundamental pulses is developed. The results show that the modulation of refractive index in nonlinear crystals can increase the phase matching (PM) bandwidth of SHG and therefore compress SH pulses. The modulation will complicate the SHG process, which makes the pulse width, conversion efficiency varying with length and bandwidth. Especially, an overshooting compression phenomenon is found, arising mainly from an internal interference of the carrier frequency component in a SH pulse.

Keywords (OCIS):

  • (190.2620) Nonlinear optics : Harmonic generation and mixing
  • (190.4400) Nonlinear optics : Nonlinear optics, materials
  • (190.7110) Nonlinear optics : Ultrafast nonlinear optics
  • (320.5520) Ultrafast optics : Pulse compression

Refractive index switching based on loss controlling in a doped metamaterial slab

  • Hamed Sattari and Mostafa Sahrai
  • received 01/06/2014; accepted 04/06/2014; posted 04/07/2014; Doc. ID 204158
  • [full text: PDF (1241) KB)]
  • Abstract: An all-optical refractive index switch is proposed based on coherent control of a doped double negative metamaterial (DNM) slab. By embedding the three-level atoms through the left-handed slab the effective permittivity of the slab becomes a function of the doped atom's susceptibility. Absorption properties manipulation of the doped atoms leads to an active control over the total loss of the metamaterial slab. This way, the refractive index of the slab can be switched between negative and positive by the change of the relative phase of the applied fields. This may offer an active control over the transmission in a wide range from 0 to 0.58.

Keywords (OCIS):

  • (160.4760) Materials : Optical properties
  • (270.1670) Quantum optics : Coherent optical effects
  • (160.3918) Materials : Metamaterials
  • (130.4815) Integrated optics : Optical switching devices

(SLI) Investigation of the unusual surface plasmon modes and switching bandgap in three-dimensional photonic crystals with pyrochlore lattices composed of the epsilon-negative materials

  • HaiFeng Zhang, Shao-Bin Liu, and Xiang Kong
  • received 12/23/2013; accepted 04/04/2014; posted 04/07/2014; Doc. ID 203603
  • [full text: PDF (1116) KB)]
  • Abstract: The unusual surface plasmon modes and switching bandgap of three-dimensional (3D) photonic crystals (PCs) with pyrochlore lattices which are composed of the core isotropic positive-index dielectric spheres with surrounded by the epsilon-negative (ENG) materials shells inserted in the air, are theoretically investigated in detail based on the plane wave expansion method. Numerical simulations show that the proposed double-shell structure can obtain the complete photonic band gaps (PBGs) and a flatbands region. Compared to the conventional lattices, such as diamond, face-centered-cubic, body-centered-cubic and simple-cubic lattices, the larger PBG can be achieved in the pyrochlore arrangement. It is noticed that the flatbands region is determined by the existence of surface plasmon modes. If the thickness of ENG materials shell is larger than a threshold value, the band structures of such 3D PCs will be similar to those obtained from the same structure containing the pure ENG material spheres. In this case, the inserted core spheres also will not affect the band structures. It is also provided that the upper edge of flatbands region does not depend on the topology of lattice. Our results also demonstrate that the PBG can be manipulated by the radius of core dielectric sphere, the dielectric constant of ENG materials and the electronic plasma frequency, respectively. It means that the PBG can be obtained by replacing the pure ENG materials spheres with such double-shell structures to save the material in the realization. Thus, such proposed 3D PCs offer a novel way to realize the potential applications.

Keywords (OCIS):

  • (160.4670) Materials : Optical materials
  • (160.3918) Materials : Metamaterials
  • (160.5293) Materials : Photonic bandgap materials
  • (160.5298) Materials : Photonic crystals

Nonlinear coupler operating on Werner-like states -- entanglement creation, its enhancement and preservation

  • A. Kowalewska-Kudlaszyk and W. Leonski
  • received 02/06/2014; accepted 04/03/2014; posted 04/03/2014; Doc. ID 205925
  • [full text: PDF (874) KB)]
  • Abstract: We discuss a model of two nonlinear Kerr-like oscillators, mutually coupled and excited by parametric process. We show that the system's evolution, starting from Werner-like states, remains closed within a small set of two-mode n-photon states the system, and pure two-qubit entangled state can be generated. For some initial Werner-like states delayed entanglement generation can be observed. We investigate the influence of two damping mechanisms on the system's evolution. We show that for the both cases, the entanglement can survive despite the presence of damping, and the effects of sudden entanglement death and its rebirth can appear in the system.

Keywords (OCIS):

  • (190.3270) Nonlinear optics : Kerr effect
  • (270.0270) Quantum optics : Quantum optics
  • (270.5585) Quantum optics : Quantum information and processing

Field enhancement and target localization impact on the biosensitivity of nano-structured plasmonic sensors

  • Maha Chamtouri, Mitradeep Sarkar, Julien Moreau, Mondher Besbes, Hassen Ghalila, and Michael Canva
  • received 12/05/2013; accepted 04/03/2014; posted 04/07/2014; Doc. ID 202572
  • [full text: PDF (1961) KB)]
  • Abstract: Surface Plasmon Resonance biosensors using field enhancement in nano-grating surfaces can overcome sensitivity limitations of conventional SPR biosensors. Nevertheless, the correlation of the local field enhancement established in such structures with sensitivity enhancement has not been extensively studied. We present a numerical study of the coupling effect between the various plasmon modes present in nano-grating structures with various structural parameters. We give here, a quantitative demonstration of the improvement in sensing performance of SPR biosensors by selective localization of the target molecules in the regions where the electromagnetic field is locally enhanced.

Keywords (OCIS):

  • (130.6010) Integrated optics : Sensors
  • (240.6680) Optics at surfaces : Surface plasmons
  • (280.1415) Remote sensing and sensors : Biological sensing and sensors
  • (160.4236) Materials : Nanomaterials
  • (310.6628) Thin films : Subwavelength structures, nanostructures

Optimized aperiodic highly directional narrowband infrared emitters

  • Christopher Granier, Francis Afzal, Changjun Min, Jonathan Dowling, and Georgios Veronis
  • received 01/16/2014; accepted 04/03/2014; posted 04/15/2014; Doc. ID 204523
  • [full text: PDF (786) KB)]
  • Abstract: In this paper, we present optimized aperiodic structures for use as narrowband, highly directional thermal infrared emitters for both TE and TM polarizations. These aperiodic multilayer structures designed with alternating layers of silicon and silica on top of a semi-infinite tungsten substrate exhibit extremely high emittance peaked around the wavelength at which the structures are optimized. Structures were designed by a genetic optimization algorithm coupled to a transfer matrix code which computed thermal emittance. First, we investigate the properties of the genetic-algorithm optimized aperiodic structures and compare them to a previously proposed resonant cavity design. Second, we investigate a structure optimized to operate at the Wien wavelength corresponding to a near-maximum operating temperature for the materials used in the aperiodic structure. Finally, we present a structure that exhibits nearly monochromatic and highly directional emittance for both TE and TM polarizations at the frequency of one of the molecular resonances of carbon monoxide (CO); hence, the design is suitable for a detector of CO via absorption spectroscopy.

Keywords (OCIS):

  • (260.0260) Physical optics : Physical optics
  • (350.4238) Other areas of optics : Nanophotonics and photonic crystals

Divided-pulse compression with gas-filled hollow-core fiber for generation of high-energy few-cycle pulses

  • Ding Wang, Yuxin Leng, and Zhiyuan Huang
  • received 01/21/2014; accepted 04/01/2014; posted 04/11/2014; Doc. ID 205126
  • [full text: PDF (1340) KB)]
  • Abstract: We study theoretically a pulse compression method with gas-filled hollow-core fiber based on pulse division. The input pulse is first divided temporally into a sequence of almost identical sub-pulses by birefringent optical elements which are designed to have nearly zero group delay dispersion. Then, these sub-pulses are coupled into gas-filled hollow-core fiber for spectrum broadening independently. Last, the sub-pulses are recombined into one pulse by the birefringent elements and compressed temporally. This method is demonstrated to be suitable to compress ultrafast pulses with energies far above millijoule to few-cycle level. Several key issues on successfully implementing this method are analyzed quantitatively; and the limitations are also discussed.

Keywords (OCIS):

  • (190.7110) Nonlinear optics : Ultrafast nonlinear optics
  • (320.5520) Ultrafast optics : Pulse compression
  • (140.3298) Lasers and laser optics : Laser beam combining

Effect of damping on Goos-H¨anchen shift from weakly absorbing anisotropic metamaterials

  • Ruey-Lin Chern
  • received 01/10/2014; accepted 04/01/2014; posted 04/01/2014; Doc. ID 204460
  • [full text: PDF (1147) KB)]
  • Abstract: The effect of damping on the Goos-H¨anchen (GH) shift from weakly absorbing anisotropic metamaterials is investigated. Explicit formulas of the GH shifts are derived and analyzed at three particular angles of incidence: critical angle, pseudo-Brewster angle, and grazing incidence, near which the reflection phases exhibit strong variations and large GH shifts are likely to occur. The damping in the anisotropic metamaterials may result in GH shifts not available in ordinary isotropic media. In particular, a larger GH shift can be associated with a larger rather than a smaller damping, and a small change of damping may even reverse the direction of the GH shift near the pseudo-Brewster angle. This feature is characterized by a parabolic relation determined by the complex components of the permittivity tensor. The GH shifts are also illustrated with the incidence of Gaussian beams based on Fourier integral formulation.

Keywords (OCIS):

  • (120.5700) Instrumentation, measurement, and metrology : Reflection
  • (260.0260) Physical optics : Physical optics
  • (260.2110) Physical optics : Electromagnetic optics

Wide-incident-angle chromatic polarized transmission on tri-layer silver/dielectric nanowire gratings

  • Shu Sun, Zhicheng Ye, Lindong Guo, and Nanling Sun
  • received 02/14/2014; accepted 04/01/2014; posted 04/01/2014; Doc. ID 206499
  • [full text: PDF (1034) KB)]
  • Abstract: Subwavelength gratings consisting of three layers with periodic structures are investigated. Different from the results of many previous works that the transmittance of transverse magnetic (TM) light is higher than that of transverse electric (TE) light over the entire visible range, the transmittance is flipped in the short-wavelength regime, owing to localized surface plasmon enhanced absorption of TM light by silver nanowires, while the converse holds in the longer-wavelength region because of the plasmonic waveguiding and cut-off effect of the metal-insulator-metal slits which enhance TM transmission and prohibit TE propagation, respectively. Thus chromatic polarizations are rendered. Due to the non-resonance character, the spectral responses of the gratings vary little in a wide incident angle range. This work reveals a novel mechanism to fabricate integrated color filters and polarizers conveniently, which has broad applications in liquid crystal displays (LCDs) and CMOS sensors.

Keywords (OCIS):

  • (230.0230) Optical devices : Optical devices
  • (230.5440) Optical devices : Polarization-selective devices
  • (160.4236) Materials : Nanomaterials
  • (230.7408) Optical devices : Wavelength filtering devices

Atomic coherences of on-resonant and off-resonant two-photon absorptions in ladder-type atomic system

  • Han Seb Moon and Heung-Ryoul Noh
  • received 12/23/2013; accepted 04/01/2014; posted 04/03/2014; Doc. ID 203360
  • [full text: PDF (495) KB)]
  • Abstract: We report the physical origins of the on-resonant and off-resonant two-photon absorption (TPA) in an open ladder-type atomic system of the 5S1/2 (F = 1)-5P3/2 (F′ = 0, 1, 2)-5D5/2 (F″ = 1, 2, 3) transitions in 87Rb atoms. When the on-resonant TPA including electromagnetically induced transparency (EIT) was transformed into the off-resonant TPA according to the coupling laser frequency detuning, we clarified the dynamics of the atomic coherences by decomposing into the two-photon coherence (TC) and the crossover coherence (CC) terms mixed between one-photon coherence (OC) and TC terms. The physical origins of the two TPAs were completely different; the cause of the on-resonant TPA was the CC term, and that of the off-resonant TPA was the TC term.

Keywords (OCIS):

  • (020.1670) Atomic and molecular physics : Coherent optical effects
  • (020.3690) Atomic and molecular physics : Line shapes and shifts
  • (300.6210) Spectroscopy : Spectroscopy, atomic

Polarization dependence of light transmission through individual nano-apertures in metal films

  • Kaan Gunay, Patrick Flanigan, Pei Liu, and Domenico Pacifici
  • received 12/05/2013; accepted 04/01/2014; posted 04/01/2014; Doc. ID 202193
  • [full text: PDF (1666) KB)]
  • Abstract: We present a systematic study of light transmission through individual nanoscale apertures (rectangular slits and circular holes) etched in a 300nm-thick silver film. Transmisson spectra were obtained as functions of aperture shape and size, as well as wavelength and polarization state of the normally-incident light beam. By varying the wavelength of the incident light in the 550 to 750 nm range and the characteristic dimensions of the apertures from ~ 100 nm to 10 μm, a universal behavior of light transmission is revealed. The role of incident polarization and aperture dimensions is investigated in detail, and a clear transition from the geometric regime of light transmission (large apertures) to the subwavelength regime is demonstrated experimentally. A quantitative analysis of the extinction coefficient is reported for rectangular slits, demonstrating that they can act as efficient linear polarizers. Finally, a method to convert far-field to near-field data is developed for circular apertures, revealing the contribution of surface plasmon polaritons to the decrease in light transmission for apertures below the cutoff condition.

Keywords (OCIS):

  • (050.1220) Diffraction and gratings : Apertures
  • (050.1940) Diffraction and gratings : Diffraction
  • (260.3910) Physical optics : Metal optics
  • (310.3915) Thin films : Metallic, opaque, and absorbing coatings
  • (350.4238) Other areas of optics : Nanophotonics and photonic crystals
  • (050.6624) Diffraction and gratings : Subwavelength structures

Articles 1 to 20 of 29 Next Page >>





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings