Topic
Polarization (waves)
About: Polarization (waves) is a research topic. Over the lifetime, 65352 publications have been published within this topic receiving 984723 citations. The topic is also known as: polarisation.
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TL;DR: In this paper, asymmetric c-shaped holes show mode switching between single and double-resonance frequencies in the terahertz region, when the polarization direction of the incident light is controlled.
Abstract: We report that asymmetric c-shaped holes show mode switching between single- and double-resonance frequencies in the terahertz region, when the polarization direction of the incident light is controlled. The number of resonant frequencies is attributed to fundamental shape modes such as circle-, coaxial-, and rectangular-shaped holes activated under each polarization condition. All of these resonant peaks also show a transmission of over 90% with the assistance of the periodically arranged holes. These experimental results are in close agreement with theoretical simulations.
25 citations
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TL;DR: In this paper, the authors measured ensembles of nuclear spins in a KPF6 sample using magnetic resonance force microscopy and investigated the transition between regimes dominated by thermal and statistical nuclear polarization.
Abstract: As the number of spins in an ensemble is reduced, the statistical fluctuations in its polarization eventually exceed the mean thermal polarization. This transition has now been surpassed in a number of recent nuclear magnetic resonance experiments, which achieve nanometer-scale detection volumes. Here, we measure nanometer-scale ensembles of nuclear spins in a KPF6 sample using magnetic resonance force microscopy. In particular, we investigate the transition between regimes dominated by thermal and statistical nuclear polarization. The ratio between the two types of polarization provides a measure of the number of spins in the detected ensemble.
25 citations
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TL;DR: In this article, an FDTD algorithm for simulating propagation of EM waves in anisotropic material is presented, which is based on the auxiliary differential equation and the general polarization formulation.
Abstract: In this paper, an finite-difference time-domain (FDTD) algorithm for simulating propagation of EM waves in anisotropic material is presented. The algorithm is based on the auxiliary differential equation and the general polarization formulation. In anisotropic materials, electric fields are coupled and elements in the permittivity tensor are, in general, multiterm dispersive. The presented algorithm resolves the field coupling using a formulation based on electric polarizations. It also offers a simple procedure for the treatment of multiterm dispersion in the FDTD scheme. The algorithm is tested by simulating wave propagation in 1-D magnetized plasma showing excellent agreement with analytical solutions. Extension of the algorithm to multidimensional structures is straightforward. The presented algorithm is efficient and simple compared to other algorithms found in the literature.
25 citations
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TL;DR: In this article, a nonlinear polarization-optical method of determining the absolute magnitude and orientation of the dc electric field is proposed and realized, and the polarization properties of light in coherent Raman scattering in molecular hydrogen in a DC electric field are investigated.
Abstract: The polarization properties of light in coherent Raman scattering in molecular hydrogen in a dc electric field are investigated. A nonlinear polarization-optical method of determining the absolute magnitude and orientation of the dc electric field is proposed and realized.
25 citations
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TL;DR: Amorphous Si subwavelength transmission gratings (SWTGs) with a thickness of 240 nm and a period ranging from 50 to 900 nm were fabricated on a fused silica substrate using electron beam lithography, lift-off, and reactive ion etching as mentioned in this paper.
Abstract: Amorphous Si subwavelength transmission gratings (SWTGs) with a thickness of 240 nm and a period ranging from 50 to 900 nm were fabricated on a fused silica substrate using electron beam lithography, lift‐off, and reactive ion etching. At certain grating periods, the SWTGs exhibit polarization dependent reflectance and transmittance due to the polarization dependent coupling of the eigenmodes inside the grating. By putting the SWTG in front of the output window of a vertical cavity surface emitting laser (VCSEL), a polarization dependent optical feedback can be achieved. Using this feedback, we demonstrated the locking, switching, and enhancement of the VCSEL’s polarization. A polarization ratio as high as 200:1 was achieved.
25 citations