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 18 of 18

January


Raman-Ramsey electromagnetically induced transparency in the configuration of counterpropagating pump and probe in vacuum Rb cell

  • Marina Lekic, Brana Jelenkovic, Ivan Radojicic, Milan Radonjic, Dragan Lukic, and Zoran Grujic
  • received 11/19/2014; accepted 01/22/2015; posted 01/22/2015; Doc. ID 226841
  • [full text: PDF (1449) KB)]
  • Abstract: Counter-propagating, spatially separated hollow pump and coaxial probe laser beams generate narrow Zeeman electromagnetically induced transparency (EIT) resonances in the vacuum Rb cell. The lasers are locked to D2 line transition Fg = 2 → Fe = 1 of 87Rb. For the probe laser beam intensity between 0.1 mW/cm2 and 3.0 mW/cm2 this Ramsey type configuration yields dual-structured resonances having narrow peak on top of broader pedestal. Linewidths of the narrow peak are nearly independent of the probe laser beam intensity and of the probe diameter (for diameters 0.8 mm and 2.7 mm), provided that the dark region between the pump and the probe beams is fixed. At the probe laser beam intensities below 0.1 mW/cm2 Zeeman EIT is a single narrow resonance. With this geometry of laser beams, and at low probe intensity, the presence of the pump enables the probe EIT, i.e., the probe transmission becomes enhanced in a narrow spectral window. Accompanying theoretical model showed good quantitative agreement with the measurements.

Keywords (OCIS):

  • (270.1670) Quantum optics : Coherent optical effects
  • (300.3700) Spectroscopy : Linewidth

Interface Modes for Monolithic Nonlinear Photonics

  • Amr Helmy, Junbo Han, Payam Abolghasem, and Arghavan Arjmand
  • received 11/28/2014; accepted 01/22/2015; posted 01/22/2015; Doc. ID 228725
  • [full text: PDF (1065) KB)]
  • Abstract: A design methodology for obtaining versatile interface modes in monolithic structures is discussed. These modes are then utilized in conjunction with total internal reflection modes for phase-matching second-harmonic generation in periodic layered media in AlxGa1-xAs material system. Typical loss values of 2:71 cm-1 for TE and 4:26 cm-1 for TM-polarized pump around 1550 nm were obtained. Nonlinear characterizations are carried out using 2-ps, 30-ps and continuous-wave pump for type-I and type-II interactions. Maximum SHG conversion efficiency of 1:14104 %W-1cm-2 is observed for type-II process with a pump power of 0.52 mW in a sample with a length of 2.0 mm.

Keywords (OCIS):

  • (190.4390) Nonlinear optics : Nonlinear optics, integrated optics
  • (190.4400) Nonlinear optics : Nonlinear optics, materials
  • (190.4410) Nonlinear optics : Nonlinear optics, parametric processes
  • (240.1485) Optics at surfaces : Buried interfaces
  • (130.7405) Integrated optics : Wavelength conversion devices

Intrinsic and extrinsic absorption of CVD single crystal diamond from the middle ultraviolet to the far infrared

  • Scott Webster, Ying Chen, Giorgio Turri, Andrew Bennett, Benjamin Wickham, and Michael Bass
  • received 11/24/2014; accepted 01/20/2015; posted 01/22/2015; Doc. ID 228330
  • [full text: PDF (501) KB)]
  • Abstract: Optical absorption is reported in high quality single crystal, type IIa diamond grown by microwave-assisted chemical vapor deposition. Laser calorimetry and spectrophotometry were used at wavelengths from the ultraviolet to the infrared. There is minimal evidence of extrinsic absorption on or near the short wavelength side of the middle-ultraviolet edge (200-300 nm) or in the infrared absorption bands. At the long wavelength side of the middle-ultraviolet and extending into the visible, extrinsic absorption dominates, which is directly proportional to the amount of nitrogen and nitrogen-related lattice defects in diamond. At 10.6 µm, the measured absorption coefficients are comparable with, or less than, those of the highest quality samples previously reported. Evidence is presented showing that our measurements serve as upper bounds on the absorption coefficients and call into question previous calorimetric reports of near intrinsic absorption in the visible, near infrared and at 10.6 μm.

Keywords (OCIS):

  • (160.3380) Materials : Laser materials
  • (160.4670) Materials : Optical materials
  • (160.4760) Materials : Optical properties

Trapping of Rayleigh spheroidal particles by highly focused radially polarized beams

  • Manman Li, Shaohui Yan, Baoli Yao, Ming Lei, Yan long Yang, Junwei Min, and Dan Dan
  • received 11/27/2014; accepted 01/19/2015; posted 01/22/2015; Doc. ID 228629
  • [full text: PDF (958) KB)]
  • Abstract: The optical forces and intrinsic optical torque of a highly focused radially polarized beam on a Rayleigh spheroidal particle are calculated with the dipole approximation. Numerical results show that the maximal trapping forces depend strongly on the orientation of the particle, and the torque is always perpendicular to the plane containing the major axis of spheroid and the optical axis. As a result of optical mechanical and torque equilibrium, the particle will stay at the focus with the major axis of the spheroid parallel to the optical axis.

Keywords (OCIS):

  • (140.7010) Lasers and laser optics : Laser trapping
  • (260.2110) Physical optics : Electromagnetic optics
  • (290.0290) Scattering : Scattering
  • (290.5870) Scattering : Scattering, Rayleigh

Double Stokes Mueller polarimetry of second harmonic generation in ordered molecular structures

  • Masood Samim, Serguei Krouglov, and Virginijus Barzda
  • received 11/24/2014; accepted 01/17/2015; posted 01/22/2015; Doc. ID 226046
  • [full text: PDF (496) KB)]
  • Abstract: Second harmonic generation (SHG) is highly sensitive to the structure of ordered aggregates, and therefore, polarization measurement of SHG can help to elucidate the organization of molecules in crystalline structures. The double Stokes Mueller formalism is developed for the SHG polarimetry and convenient expressions are derived for the double Mueller matrix in terms of the nonlinear susceptibilities. The polarization analysis is presented for cylindrically symmetric structures providing the method to calculate the characteristic susceptibility component ratios and orientations of molecules in the ordered aggregates. This information, for example, can be used to investigate collagen or myosin structure in biological tissues.

Keywords (OCIS):

  • (190.0190) Nonlinear optics : Nonlinear optics
  • (190.2620) Nonlinear optics : Harmonic generation and mixing
  • (260.5430) Physical optics : Polarization
  • (180.4315) Microscopy : Nonlinear microscopy
  • (240.2130) Optics at surfaces : Ellipsometry and polarimetry

The unified analytical theory of single-order soft X-ray multilayer gratings

  • Xiaowei Yang, Igor Kozhevnikov, Qiushi Huang, and Zhanshan Wang
  • received 12/10/2014; accepted 01/16/2015; posted 01/16/2015; Doc. ID 229135
  • [full text: PDF (754) KB)]
  • Abstract: A universal analytical theory of soft X-ray multilayer gratings operating in the single-order regime is developed here. The single-order regime, in which an incident wave excites the only diffracted wave, is characterized by the maximum possible diffraction efficiency tending to the reflectivity of a conventional multilayer mirror. The theory is applied to analysis of different multilayer gratings including lamella multilayer gratings, sliced multilayer gratings, blazed multilayer gratings, and blazed lamella multilayer gratings. A simple analytical formula describing the diffraction efficiency of arbitrary multilayer grating as a function of the wavelength and the incidence angle is deduced. Expressions for the peak value of the diffraction efficiency and the generalized Bragg condition corresponding to the maximum efficiency are obtained. The high accuracy of the deduced analytical expressions is justified by comparison with rigorous numerical calculations. Comparative analysis of different types of gratings is performed. The advantages and disadvantages of different gratings in practical applications are discussed.

Keywords (OCIS):

  • (050.1950) Diffraction and gratings : Diffraction gratings
  • (050.1960) Diffraction and gratings : Diffraction theory
  • (230.4170) Optical devices : Multilayers
  • (340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)

Arbitrary sum arithmetic of lights with orbital angular momentum based on sum frequency generation

  • Zhiyuan Zhou, Yan Li, Dongsheng Ding, and Bao-Sen Shi
  • received 08/15/2014; accepted 01/16/2015; posted 01/16/2015; Doc. ID 221070
  • [full text: PDF (1479) KB)]
  • Abstract: Frequency sum of two light beams carrying orbital angular momentum (OAM) in quasi-phase matching crystals was reported for the first time. The situations in which one light carried OAM and the other was in Gaussian mode and both beams carried OAM were studied in detail. Arbitrary sum arithmetic of lights with OAM was demonstrated in the conversion process, which verified OAM conservation in the sum frequency generation process. We give an analytical expression for the frequency conversion of two OAM-carrying beams, the experimental results are in well matched with the theoretical predictions. The methods showed here provide an effective way for OAM light generation. Our study is very promising in constructing hybrid OAM-based optical communication networks and all optical spatial mode switching.

Keywords (OCIS):

  • (190.2620) Nonlinear optics : Harmonic generation and mixing
  • (050.4865) Diffraction and gratings : Optical vortices

Experimental analysis of coherent supercontinuum generation and ultrashort pulse generation using cross-correlation frequency resolved optical gating (X-FROG)

  • Norihiko Nishizawa, Atsushi Okamura, Youichi Sakakibara, Hiromichi Kataura, and Emiko Omoda
  • received 09/22/2014; accepted 01/15/2015; posted 01/16/2015; Doc. ID 223663
  • [full text: PDF (1319) KB)]
  • Abstract: We investigated the generation of a coherent, wideband supercontinuum (SC) with good flatness in a normal-dispersion highly nonlinear fiber and an ultrashort-pulse Er-doped fiber laser system. A passively mode-locked ultrashort-pulse Er-doped fiber laser with a carbon nanotube film was developed as the seed pulse source. A high-power soliton pulse was generated with the developed fiber laser, fiber amplifier, and optical fibers, and a high-quality coherent SC was generated in the normal-dispersion highly nonlinear fiber. The spectrogram of the generated SC was directly observed using cross-correlation frequency resolved optical gating, and the characteristics were investigated. Then, ultrashort pulse generation by dispersion compensation of the generated SC was also investigated in an all-fiber system. Extremely short pulses (22 fs) were generated. The characteristics of the SC and ultrashort pulses were investigated experimentally.

Keywords (OCIS):

  • (060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
  • (190.4370) Nonlinear optics : Nonlinear optics, fibers
  • (320.5520) Ultrafast optics : Pulse compression
  • (320.7140) Ultrafast optics : Ultrafast processes in fibers
  • (320.6629) Ultrafast optics : Supercontinuum generation

Soliton control by a weak dispersive pulse

  • Luca Tartara
  • received 10/27/2014; accepted 01/15/2015; posted 01/16/2015; Doc. ID 225687
  • [full text: PDF (414) KB)]
  • Abstract: A detailed experimental investigation about the propagation of a fundamental soliton interacting with a weak dispersive pulse at an optical event horizon is presented. The results show that the soliton is either red- or blue-shifted depending on the wavelength of the dispersive pulse. As a consequence of such a wavelength shift, the soliton is either stretched or compressed. The results thus demonstrate the possibility of controlling the propagation of an intense optical pulse by means of a less powerful pulse.

Keywords (OCIS):

  • (190.4370) Nonlinear optics : Nonlinear optics, fibers
  • (190.5530) Nonlinear optics : Pulse propagation and temporal solitons
  • (190.7110) Nonlinear optics : Ultrafast nonlinear optics

Optical resonators based on Bloch surface waves

  • Matteo Menotti and Marco Liscidini
  • received 11/19/2014; accepted 01/15/2015; posted 01/16/2015; Doc. ID 227150
  • [full text: PDF (883) KB)]
  • Abstract: A few recent works suggest the possibility of controlling light propagation at the interface of periodic multilayers supporting Bloch surface waves (BSWs), but optical resonators based on BSWs are yet to demonstrate. Here we discuss the feasibility of exploiting guided BSWs in a ring resonator configuration. In particular, we investigate the main issues related to the design of these structures, and we discuss about their limitations in terms of quality factors and dimensions. We believe these results might be useful for the development of a complete BSW-based platform for application ranging from optical sensing to the study of the light-matter interaction in micro and nano structures.

Keywords (OCIS):

  • (230.5750) Optical devices : Resonators
  • (240.6690) Optics at surfaces : Surface waves
  • (250.5300) Optoelectronics : Photonic integrated circuits

Computational Studies of Light Shift in Raman-Ramsey Interference-Based Atomic Clock

  • Gour Pati, Zachary Warren, Nan Yu, and Selim Shahriar
  • received 11/19/2014; accepted 01/12/2015; posted 01/13/2015; Doc. ID 228241
  • [full text: PDF (1258) KB)]
  • Abstract: Determining light shift in Raman-Ramsey interference is important for the development of atomic frequency standards based on a vapor cell. We have accurately calculated light shift in Raman-Ramsey interference using the density-matrix equations for a three-level system without invoking the adiabatic approximation. Specifically, phase shifts associated with coherent density-matrix terms are studied as they are relevant to the detection of Raman-Ramsey interference in transmission (or absorption) through the medium. For the single-velocity case, the numerically computed results are compared with the analytical results obtained using the adiabatic approximation. The result shows light shift suppression in conformity with the closed-form analytic solutions. The computational studies have also been extended to investigate Raman-Ramsey interference for a Doppler-broadened vapor medium. Importantly, a velocity-induced frequency shift is found at the fringe center as an additional source of frequency error for a vapor cell Raman clock.

Keywords (OCIS):

  • (020.1670) Atomic and molecular physics : Coherent optical effects
  • (020.3690) Atomic and molecular physics : Line shapes and shifts
  • (020.6580) Atomic and molecular physics : Stark effect

Complex Doppler effect in left-handed metamaterials

  • David Ziemkiewicz and Sylwia Zielińska-Raczyńska
  • received 12/10/2014; accepted 01/08/2015; posted 01/09/2015; Doc. ID 228803
  • [full text: PDF (470) KB)]
  • Abstract: The Doppler shift is investigated in one-dimensional system with moving source. Theoretical findings are confirmed by numerical simulations of optical and acoustical waves propagation in a simple metamaterial model, showing the reversed shift and the existence of multiple frequency modes. The properties of these waves are discussed and the effect of absorption on the phenomenon is outlined.

Keywords (OCIS):

  • (350.3618) Other areas of optics : Left-handed materials
  • (160.3918) Materials : Metamaterials

Efficient End-fire Coupling of Surface Plasmons in a Metal Waveguide

  • Caitlin Fisher, C. Martijn de Sterke, Ross McPhedran, Chris Poulton, and Lindsay Botten
  • received 09/03/2014; accepted 01/08/2015; posted 01/08/2015; Doc. ID 222362
  • [full text: PDF (43617) KB)]
  • Abstract: We present a semi-analytical study exploring the end-fire coupling of an incident beam into a surface plasmon mode propagating on a metal-dielectric interface. An energy-conserving projection method is used to solve for the resultant reflected and transmitted fields for a given incident beam, thereby determining the efficiency of the surface plasmon coupling. The coupling efficiency is found to be periodic with waveguide width due to the presence of a parasitically coupled transversely-propagating surface plasmon. Optimisation of the incident beam parameters, such as beam width, position and wavelength leads to numerically observed maximum efficiencies of approximately 80% when the beam width roughly matches the width of the surface plasmon.

Keywords (OCIS):

  • (240.5420) Optics at surfaces : Polaritons
  • (240.6680) Optics at surfaces : Surface plasmons

Analysis of third order nonlinearity effects in very high-Q WGM resonator cavity ring down spectroscopy

  • Yannick Dumeige, alphonse rasoloniaina, Vincent Huet, Monique Thual, Stéphane Balac, and Patrice Feron
  • received 09/19/2014; accepted 01/06/2015; posted 01/08/2015; Doc. ID 223464
  • [full text: PDF (1161) KB)]
  • Abstract: The time domain coupled-mode theory (CMT) is applied to the analysis of the dynamic of third order optical nonlinear effects in high-finesse whispering-gallery-mode (WGM) resonators. We show that this model is well adapted to the analysis of cavity-ring-down spectroscopy signal under modal-coupling due to Rayleigh backscattering both in the linear and nonlinear regimes. The experiments are carried out in silica WGM microspheres. Considering thermal and Kerr effects, CMT simulations are in good agreement with experimental results for input power up to about 1 mW. For well known optical materials such as silica, this experimental data analysis method can be used to measure the quality factor, the coupling regime, and the mode volume of high-finesse WGM. Furthermore, this technique could be developed to infer both linear and nonlinear properties of high-finesse coated WGM microspheres.

Keywords (OCIS):

  • (190.1450) Nonlinear optics : Bistability
  • (190.3270) Nonlinear optics : Kerr effect
  • (300.0300) Spectroscopy : Spectroscopy
  • (140.3945) Lasers and laser optics : Microcavities
  • (230.4555) Optical devices : Coupled resonators

(OCT2014) Optical collimation of an atomic beam using a white light molasses

  • Rohan Glover and Thierry Bastin
  • received 11/04/2014; accepted 01/02/2015; posted 01/16/2015; Doc. ID 226250
  • [full text: PDF (1739) KB)]
  • Abstract: We investigate optical collimation of an atomic beam using a spectrally broadened `white light molasses'. We compare this technique with the standard technique using an atomic collimator and find that under certain conditions the white light molasses is preferable. Specifically, a white light molasses is suitable for atomic beams with relatively low mean velocities and broad velocity distributions, for example a beam effusing from a cryogenically cooled reservoir. This result is demonstrated by numerically modeling the atomic trajectories of argon atoms effusing from a cryogenically cooled reservoir. We find that given sufficient power a white light molasses captures a larger fraction of atoms when compared to an atomic collimator and the velocity distribution of the resulting beam is shifted towards slower velocities. Further, an optical molasses is geometrically relatively simple compared to an atomic collimator and therefore the complexity of the in vacuum optical arrangement can be significantly reduced.

Keywords (OCIS):

  • (000.2170) General : Equipment and techniques
  • (020.0020) Atomic and molecular physics : Atomic and molecular physics
  • (020.3320) Atomic and molecular physics : Laser cooling

Cross mode and polarization mixing in third and one-third harmonic generation in multi-mode waveguides

  • Max Lohe, Tanya Monro, Shahraam Afshar, and Daniel Hartley
  • received 09/19/2014; accepted 01/02/2015; posted 01/08/2015; Doc. ID 211212
  • [full text: PDF (736) KB)]
  • Abstract: We develop a general vectorial model of two frequency nonlinear pulse propagation in optical waveguides, including mixing effects between modes and polarizations across both frequencies, resulting in nontrivial new terms in the amplitude propagation equations. We present rules for calculating these terms from simple diagrammatic representations of physical processes. The corresponding coefficients are computed numerically for a simple step index fiber, demonstrating that even in the simplest case of a cylindrical fiber, these coefficients are significant in magnitude. These additional terms predict higher gain for third harmonic generation than equivalent models without mode and polarization mixing effects, and also predict power exchange between orthogonal polarizations and non phase matched modes in the waveguide.

Keywords (OCIS):

  • (190.2620) Nonlinear optics : Harmonic generation and mixing
  • (190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
  • (190.5530) Nonlinear optics : Pulse propagation and temporal solitons

December


(EPR2014) Channel Steering

  • Marco Piani
  • received 11/04/2014; accepted 12/24/2014; posted 01/06/2015; Doc. ID 226183
  • [full text: PDF (292) KB)]
  • Abstract: We introduce and study the notion of steerability for channels. This generalizes the notion of steerability of bipartite quantum states. We discuss a key conceptual difference between the case of states and the case of channels: while state steering deals with the notion of ``hidden' states, steerability in the channel case is better understood in terms of coherence of channel extensions, rather than in terms of ``hidden' channels. This distinction vanishes in the case of states. We further argue how the proposed notion of lack of coherence of channel extensions coincides with the notion of channel extensions realized via local operations and classical communication. We also discuss how the Choi-Jamiolkowski isomorphism allows the direct application of many results about states to the case of channels. We introduce measures for the steerability of channel extensions.

Keywords (OCIS):

  • (020.5580) Atomic and molecular physics : Quantum electrodynamics
  • (040.4200) Detectors : Multiple quantum well
  • (040.5570) Detectors : Quantum detectors
  • (270.0270) Quantum optics : Quantum optics
  • (270.5565) Quantum optics : Quantum communications
  • (270.5585) Quantum optics : Quantum information and processing

Comment on “Elliptic cylindrical pseudo-optical black hole for omnidirectional light absorber”

  • Alexander Kildishev, Ludmila Prokopeva, and Evgenii Narimanov
  • received 11/20/2014; accepted 12/09/2014; posted 12/15/2014; Doc. ID 228243
  • [full text: PDF (2995) KB)]
  • Abstract: We prove that Lee’s et al. theoretical analysis and a final formula for ray trajectories in an elliptic cylindrical optical ‘black hole’ are incorrect. By utilizing a full wave finite-element simulation we show that a non-paraxial Gaussian beam does not follow a trajectory obtained using their recipe.

Keywords (OCIS):

  • (260.0260) Physical optics : Physical optics
  • (350.6980) Other areas of optics : Transforms
  • (080.4295) Geometric optics : Nonimaging optical systems
  • (080.5692) Geometric optics : Ray trajectories in inhomogeneous media
  • (260.2710) Physical optics : Inhomogeneous optical media

Articles 1 to 18 of 18





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings