A Monte Carlo model was used to analyze the propagation of polarized light in linearly birefringent turbid media, such as fibrous tissues. Linearly and circularly polarized light sources were used to demonstrate the change of polarizations in turbid media with different birefringent parameters. Videos of spatially distributed polarization states of light backscattered from or propagating in bir...

It has been recently shown that the polarization of the source exciting a guided wave via near-field coupling plays a key role in determining the propagation direction of the guided way. This way, point dipoles exhibiting circularly polarization are converted into guided waves so that opposite excitation spins result in counter-propagating guided waves. This powerful concept, firstly demonstrat...

In this work we study the reflection of circularly polarised light from a nano-structured biological material found in the exocuticle of scarabus beetles. This material is made of a stack of ultra-thin (~5 nm) uniaxial layers arranged in a left-handed helicoidal stack, which resonantly reflects circularly polarized light. A chirp in the layer thickness combined with a finite absorption coeffici...

We study the rotational dynamics of solid chiral and birefringent microparticles induced by elliptically polarized laser light in optical tweezers. We find that both reflection of left circularly polarized light and residual linear retardance affect the particle dynamics. The degree of ellipticity of laser light needed to induce rotations is found. The experimental results are compared with ana...

In In this paper, two low profile, single fed cavity backed slot antennas providing a circularly polarized (CP) wave are introduced. One of the antennas presents a right-handed CP (RHCP) wave, while the other one offers a left handed CP (LHCP) wave. The proposed antennas consist of a square shaped Substrtae Integrated Waveguide (SIW) cavity incorporatng two couples of radiating slots to radiate...

We have experimentally and theoretically shown that the circularly polarized beam bearing a singly charged optical vortex propagating through a uniaxial crystal can be split after focusing into the radially and azimuthally polarized beams in the vicinity of the focal area provided that the polarization handedness and the vortex topological charge have opposite signs.

We demonstrate the observation of spin-polarized photocurrent in InSb films grown on GaAs and InP substrates and InSb quantum wells where a nonequilibrium spin population has been achieved by using circularly polarized radiation. The characteristics of our observations indicated that the circular photo galvanic effect could be responsible for the generation of the photocurrents. © 2009 American...

Graduate School of Engineering, Chiba University, Chibashi, 263–8522 Japan 広帯域な円偏波特性をもつアンテナとしては,軸 モードのヘリカルアンテナ [2] や,直交する 2点から 90◦ 位相差で給電するパッチアンテナ [3] が報告され ている.一般に衛星通信移動局用アンテナでは,前述 の広帯域特性をもつアンテナをアレー化して利用して いる.ゆえに,10%程度の周波数帯域幅をもつ円偏波 の素子アンテナが必要となる.これまでに,このよう な衛星通信システムに適用可能な円偏波アレーアンテ ナの構成法について,いくつかの報告がなされている. 報告例を大別すると,広帯域な円偏波特性をもつ素子 アンテナで必要な帯域幅を確保する方法 [4]~[6] とア レーアンテナの構成を工夫して必要な帯域幅を確保す る方法がある [...

The existence of circular polarization in room-temperature protein phosphorescence is demonstrated, and time-resolved circularly polarized phosphorescence (TR-CPP) is used to characterize unique tryptophan environments in multitryptophan proteins. Circularly polarized luminescence studies provide information regarding the excited state chirality of a lumiphore which can be used to extract sensi...

Synthetic Aperture Radar (SAR) is a multipurpose sensor that can be operated in all-weather and day-night time. Recently, the SAR sensor is operated in linear polarization (HH, VV and its combination) with limited retrieved information. The characteristic of the conventional SAR sensor is bulky, high power, sensitive to Faraday rotation effect etc. Recently, we are developing the Circularly Pol...