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We have measured the polarization dependence of the detection efficiency of NbN superconducting single photon detectors. This behavior is explained by the calculated absorption efficiency of a parallel set of metal lines.
The generation method of spatial-dispersion-free optical vortices using polarization singularity due to an axially-symmetric polarizer was proposed and demonstrated with an ultrabroad-band light (~350 to ~1000 nm) and an ultrashort optical pulse (~50 fs).
We have fabricated and characterized polymeric three-dimensional layer-by-layer chiral photonic crystals. The obtained circular dichroism from polarization stop bands centered around 1.55 mum is comparable with that of recently demonstrated circular-spiral photonic crystals.
We experimentally and numerically investigate supercontinuum generation produced by circularly polarized femtosecond filaments in argon for broadband self-compression. A comparison with linear polarization indicates greater beam pointing stability and extended supercontinuum generation due to varied spatial-temporal characteristics.
We achieve impulsive alignment in a 400 K sample of diatomic iodine. Polarization measurements of rotational wave-packet revivals reveal dispersed oscillatory structures. These structures are due to centrifugal distortion resulting from the high temperature.
We present reconstructions of Wigner distributions for the polarization state of three indistinguishable photons on the generalized Poincare sphere. We study a variety of states including coherent, phase and NOON states.
We demonstrate optical super-resolution by using custom obscuration apertures and polarization effects to manipulate the pupil-function and focal-plane point-spread-function in a two-photon microscope used for semiconductor flip-chip imaging. Experimental results suggest sub-100 nm performance.
A pulsewidth tunable 10 GHz flat-top pulse train is generated based on the combined action of active mode locking and nonlinear-polarization-rotation pulse shaping. The SMSR is 65 dB and the timing jitter is 145 fs.
We demonstrate that the supercontinuum picosecond generation (SC) preserves the polarization state, linear, elliptical and circular, of the pump source. Additionally, an analysis of the main mechanism was done based on the spectra polarization dependence.
We present three spin-dependent optoelectronic devices for spin controlled photonics working at room temperature. A spin controlled light emitting diode is demonstrated which exhibits spin injection through Fe/Tb-multilayers at room temperature and in remanence. Furthermore, we show that a classical vertical resonator laser can amplify spin information even at room temperature due to its nonlinearity...
The development of integrated polarization manipulating devices opens the perspective on the use of polarization as a new design dimension in InP-based integrated optics. Examples will be given of how this results in additional functionalities.
A novel polarization-frequency-multiplexing scheme is implemented to suppress noise in a fiber-based Gaussian-modulated coherent-state quantum key distribution system. The achievable secrete key rate is 0.30 bit/pulse with a 5 km-fiber and 0.05 bit/pulse with a 20 km-fiber.
Considering the polarization state of the pseudothermal light beams, we demonstrate that the nonlocal second-order interference pattern formation does not depend on the polarization of the beams crossing the different parts of a distributed double-slit.
Angular and spectral reflectivities of GaN nano-pillar structures are investigated for heights of 350 nm, 550 nm and 720 nm. Calculations based on rigorous coupled-wave analysis show excellent agreement with the measured reflectivities for s- and p-polarizations.
We demonstrate polarization rotation of a terahertz electromagnetic wave with complimentary double-layered metal chiral gratings. We obtain an isotropic polarization rotation free from the birefringence of the structures.
We generate radially polarised beams, attractive for many scientific and technological applications, as stable eigenmodes in an optical fiber. This yields a new class of fibers that are polarization-maintaining even though they are strictly cylindrically symmetric.
We report on fabricated all-solid fibers which guide by a combination of bandgap and TIR mechanisms. The fibers show high birefringence and possess a dispersion characteristic similar to the pure bandgap guiding form.
The azimuthal anisotropy of GaN photonic crystal light-emitting diode is investigated using an annular structure. The extracted light distribution has P/S ratio of 5.5 for light propagating in GammaX direction and 2.1 for GammaM direction.
Resonant coupling to highly confined plasmonic modes in a metal-dielectric nanoscale multilayer on top of a silicon guiding core is proposed for polarization control in silicon-on-insulator waveguides.
We show electrically-pumped transverse magnetic polarized intersubband emission from a ZnCdSe/ZnCdMgSe quantum cascade structure grown lattice-matched on InP. Electroluminescence centered near 4.8 mum was observed, in good agreement with calculations.
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