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Waveguides were written in glass using the femtosecond laser direct-write technique. The refractive index changes induced were found to be polarization dependent. We propose that photo-ionization rates are the origin of this polarization dependence.
A tunable hollow waveguide with distributed Bragg reflector (DBR) mirror and a high-index-contrast-grating (HCG) mirror has been proposed. We numerically show the possibility of 2D-confinement and reduction in polarization-dependence of the proposed hollow waveguide.
We report on the formation of second-harmonic whispering-gallery modes (SH-WGMs) on the tapered ZnO nanotetrapod legs. The SH-WGMs have strong dependence on the polarization of the fundamental infrared excitation beam relative to the crystal axis.
This paper discusses the optical characteristics of a nonpolar a-plane InGaN/GaN quantum well (QW) with different indium compositions, QW well widths, and injection carrier densities. We find that the larger indium composition and smaller well width make the energy separation of |Yrang-like state to |Zrang-like state larger, and as a result enhance the polarization ratio of light. However, the polarization...
An adjustable polarization mode dispersion compensator with a variable tapered-3D-hollow-waveguide Bragg-reflector has been demonstrated exhibiting a giant-birefringence of 0.01 and a 13-psec tuning in differential-group-delay for a 3-mm-long compact device.
We experimentally study the polarization dynamics (orientation and ellipticity) of near infrared light transmitted through magnetooptic yttrium iron garnet isolator crystal pairs using a modified balanced detection scheme. When the pair separation is in the sub-millimeter range, we observed a proximity effect in which the saturation field is reduced by up to 20%. Calculations using a 1D model suggest...
Through systematic experiments and stochastic modeling we demonstrate that cell motility can be guided by optical torques exerted by the light polarization. This torque affects the actin network which is responsible for cell's movement.
We demonstrate wavelength conversion based on cross-phase modulation induced nonlinear polarization rotation in a carbon nanotubes-filled micro-slot fiber device. Wavelength converted signal with 3-dB power penalty for 10 Gb/s NRZ signal is obtained.
We present a method for describing optical properties of inhomogeneous media at mesoscopic scales. When the volume of interaction varies, the effective polarizability tensor introduces a new length scale characterizing the structural morphology.
Measurements and modeling of the propagation of the fundamental and the XPW signal emerging from a nonlinear crystal show how to manage self-phase modulation and self-focusing to improve conversion in a second crystal.
We measure the direction of a TEM00 Gaussian beam reflected from an air-glass interface. We report experimental evidence of an angular deviation of the beam axis from the Reflection Law for a light ray.
Optical responses of metal nano-aperture probes for the electric and the magnetic field polarization are investigated with radially and azimuthally polarized lights.
We demonstrate that the coherence of the electron spin state, which was transferred from the light polarization state, is tomographically measured in a semiconductor quantum well via the light-hole excitons under in-plane magnetic field by the developed tomographic Kerr rotation method.
Using polarization spectroscopy to control the shape of the diode current ramp while tuning an external cavity diode laser we achieved mode-hop free tuning of up to 105 GHz with an uncoated, off-the-shelf laser diode.
We report a gain-enhanced and spectral-narrowed optical parametric oscillator based on a monolithic PPLN integrating an optical parametric generator with two electro-optically active polarization-mode converters. Unique spectral manipulation of the OPO signal is also demonstrated.
We found that tighter focal spots with longer depths of focus are achieved by radially polarized annular beams with controlled inner and outer radii, which could lead to high-tolerance, super-resolution applications in compact optical systems.
This work for the first time, experimentally demonstrates the polarization switching in 1.3-mum quantum dot VCSEL. The polarization switching in quantum dot VCSEL is achieved by adjusting the optical injection power.
Continuous channel waveguides in periodically poled KTiOPO4 with guided orthogonal polarizations are used to demonstrate type-II background-free second harmonic generation at 1505 nm with 1.2 %/(W cm2) normalized efficiency.
Power scaling by combining 885 nm upper laser level Nd:YAG pumping and multi-segmented laser rods is presented. An output power of 750 W (optical-to-optical efficiency of 58%) was demonstrated using polarization coupled diode stack pumping.
We for the first time present designs of high-Q photonic crystal nanocavities in the cases previously rendered ldquoimpossiblerdquo, including an ultra-high Q dual-polarized nanocavities, high Q/V cavities based on low-index materials, and high-Q air-band-mode cavities.
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