The Experts below are selected from a list of 154086 Experts worldwide ranked by ideXlab platform
Yu K Bliokh - One of the best experts on this subject based on the ideXlab platform.
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polarization transverse shifts and angular momentum conservation laws in partial reflection and refraction of an electromagnetic wave packet
Physical Review E, 2007Co-Authors: Yu K BliokhAbstract:We present a solution to the problem of partial reflection and refraction of a polarized paraxial Gaussian beam at the interface between two transparent media. The Fedorov-Imbert transverse shifts of the centers of gravity of the reflected and refracted beams are calculated. Our results differ in the general case from those derived previously by other authors. In particular, they obey general conservation law for the beams' total angular momentum but do not obey one-particle conservation laws for individual photons, which have been proposed by [Onoda et al. Phys. Rev. Lett. 93, 083901 (2004)]. We ascertain that these circumstances relate to the artificial model accepted in the literature for the polarized beam; this model does not fit to real beams. The present paper resolves the recent controversy and confirms the results of our previous paper [Bliokh et al. Phys. Rev. Lett. 96, 073903 (2006)]. In addition, a Diffraction Effect of angular transverse shifts of the reflected and refracted beams is described.
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polarization transverse shifts and angular momentum conservation laws in partial reflection and refraction of an electromagnetic wave packet
Physical Review E, 2007Co-Authors: Yu K BliokhAbstract:We present a solution to the problem of partial reflection and refraction of a polarized paraxial Gaussian beam at the interface between two transparent media. The Fedorov-Imbert transverse shifts of the centers of gravity of the reflected and refracted beams are calculated. Our results differ in the general case from those derived previously by other authors. In particular, they obey general conservation law for the beams' total angular momentum but do not obey one-particle conservation laws for individual photons, which have been proposed by [Onoda Phys. Rev. Lett. 93, 083901 (2004)]. We ascertain that these circumstances relate to the artificial model accepted in the literature for the polarized beam; this model does not fit to real beams. The present paper resolves the recent controversy and confirms the results of our previous paper [Bliokh Phys. Rev. Lett. 96, 073903 (2006)]. In addition, a Diffraction Effect of angular transverse shifts of the reflected and refracted beams is described.
P K Shukla - One of the best experts on this subject based on the ideXlab platform.
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3d electron fluid turbulence at nanoscales in dense plasmas
New Journal of Physics, 2008Co-Authors: Dastgeer Shaikh, P K ShuklaAbstract:We have performed three-dimensional (3D) nonlinear fluid simulations of electron fluid turbulence at nanoscales in an unmagnetized warm dense plasma in which mode coupling between wave function and electrostatic (ES) potential associated with underlying electron plasma oscillations (EPOs) lead to nonlinear cascades in inertial range. While the wave function cascades towards smaller length scales, ES potential follows an inverse cascade. We find from our simulations that the quantum Diffraction Effect associated with a Bohm potential plays a critical role in determining the inertial range turbulent spectrum and the subsequent transport level exhibited by the 3D EPOs.
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3d electron fluid turbulence at nanoscales in dense plasmas
arXiv: Plasma Physics, 2008Co-Authors: Dastgeer Shaikh, P K ShuklaAbstract:We have performed three dimensional nonlinear fluid simulations of electron fluid turbulence at nanoscales in an unmagnetized warm dense plasma in which mode coupling between wave function and electrostatic potential associated with underlying electron plasma oscillations (EPOs) lead to nonlinear cascades in inertial range. While the wave function cascades towards smaller length scales, electrostatic potential follows an inverse cascade. We find from our simulations that quantum Diffraction Effect associated with a Bohm potential plays a critical role in determining the inertial range turbulent spectrum and the subsequent transport level exhibited by the 3D EPOs.
Dastgeer Shaikh - One of the best experts on this subject based on the ideXlab platform.
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3d electron fluid turbulence at nanoscales in dense plasmas
New Journal of Physics, 2008Co-Authors: Dastgeer Shaikh, P K ShuklaAbstract:We have performed three-dimensional (3D) nonlinear fluid simulations of electron fluid turbulence at nanoscales in an unmagnetized warm dense plasma in which mode coupling between wave function and electrostatic (ES) potential associated with underlying electron plasma oscillations (EPOs) lead to nonlinear cascades in inertial range. While the wave function cascades towards smaller length scales, ES potential follows an inverse cascade. We find from our simulations that the quantum Diffraction Effect associated with a Bohm potential plays a critical role in determining the inertial range turbulent spectrum and the subsequent transport level exhibited by the 3D EPOs.
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3d electron fluid turbulence at nanoscales in dense plasmas
arXiv: Plasma Physics, 2008Co-Authors: Dastgeer Shaikh, P K ShuklaAbstract:We have performed three dimensional nonlinear fluid simulations of electron fluid turbulence at nanoscales in an unmagnetized warm dense plasma in which mode coupling between wave function and electrostatic potential associated with underlying electron plasma oscillations (EPOs) lead to nonlinear cascades in inertial range. While the wave function cascades towards smaller length scales, electrostatic potential follows an inverse cascade. We find from our simulations that quantum Diffraction Effect associated with a Bohm potential plays a critical role in determining the inertial range turbulent spectrum and the subsequent transport level exhibited by the 3D EPOs.
Xiaoyu Jiang - One of the best experts on this subject based on the ideXlab platform.
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view flipping Effect reduction and reconstruction visualization enhancement for epism based holographic stereogram with optimized hogel size
Scientific Reports, 2020Co-Authors: Xingpeng Yan, Teng Zhang, Chenqing Wang, Yunpeng Liu, Ziqiang Wang, Xi Wang, Zhe Zhang, Min Lin, Xiaoyu JiangAbstract:To reduce the view-flipping Effect and enhance the viewing resolution, the modulation characteristics of the hogel based holographic stereogram is constructed and validated. The performance of the view-flipping Effect is analyzed, and the results indicate that decreasing the size of hogel is beneficial to the reduction of the view flipping, however, which will result in significant Diffraction Effect which can degrade the reconstruction quality. Furthermore, a Diffraction-limited imaging model of the hogel based holographic stereogram is established, where both the limited aperture of the hogel and the defocused aberration of the object point are introduced, and the Effective resolvable size of the reconstructed image point is simulated. The theory shows that there is an optimal hogel size existed for the certain depth of scene. Both the numerical and optical experiments are implemented, and the results are well agreed with the theoretical prediction, which demonstrates that the view-flipping reduction and reconstruction visualization enhancement for EPISM based holographic stereogram can be achieved when the proper size of hogel is utilized.
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characteristic and improvement on the reconstructed quality of Effective perspective images segmentation and mosaicking based holographic stereogram
Applied Optics, 2019Co-Authors: Xingpeng Yan, Yibei Chen, Teng Zhang, Zhuo Chen, Song Chen, Xiaoyu JiangAbstract:Based on the Effective perspective images’ segmentation and mosaicking (EPISM) printing method, the influence of the holographic element (hogel) size on the reconstructed quality is analyzed to improve the reconstructed quality of holographic stereogram. The flipping Effect and Diffraction Effect in the spatial domain are also discussed, and the optical transfer function of the holographic stereogram is used in the spectrum domain to evaluate the reconstructed quality. Theoretical analysis and optical experimental results show that the hogel size plays an important role on the flipping Effect as well as the clarity of the reconstrued 3D perspective images of the EPISM-based holographic stereogram, and the flipping Effect can be improved significantly with optimized hogel size.
Yu U Wang - One of the best experts on this subject based on the ideXlab platform.
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three intrinsic relationships of lattice parameters between intermediate monoclinic m c and tetragonal phases in ferroelectric pb mg 1 3 nb 2 3 1 x ti x o 3 and pb zn 1 3 nb 2 3 1 x ti x o 3 near morphotropic phase boundaries
Physical Review B, 2006Co-Authors: Yu U WangAbstract:Systematic analysis of extensive experimental data confirms the theoretical prediction of three intrinsic relationships of lattice parameters between the recently discovered intermediate monoclinic ${\mathrm{M}}_{\mathrm{C}}$ phase and the conventional tetragonal phase in ferroelectric $\mathrm{Pb}[{({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3})}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}]{\mathrm{O}}_{3}$ and $\mathrm{Pb}[{({\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3})}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}]{\mathrm{O}}_{3}$ near the morphotropic phase boundaries. These intrinsic relationships of lattice parameters are fulfilled by experimental data reported in the literature for different temperatures, compositions, and electric fields. They present quantitative evidence that the intermediate monoclinic ${\mathrm{M}}_{\mathrm{C}}$ phase is a mixed state of nanometer-sized twin-related domains of the conventional ferroelectric tetragonal phase. The analysis supports the concept recently proposed by Khachaturyan and co-workers [Phys. Rev. Lett. 91, 197601 (2003)] that the intermediate monoclinic ${\mathrm{M}}_{\mathrm{C}}$ phase is adaptive ferroelectric and ferroelastic phase, which is homogeneous only on the macroscale while inhomogeneous on the nanoscale. Due to the small domain size and small ferroelastic strain, the conventional Diffraction measurement does not resolve the lattice of individual nanodomains rather instead only perceives the average Diffraction Effect of nanotwins, yielding the experimentally observed monoclinic symmetry. The result indicates that the electric-field-induced domain-wall movement plays an essential role in the ultrahigh electromechanical responses of $\mathrm{Pb}[{({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3})}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}]{\mathrm{O}}_{3}$ and $\mathrm{Pb}[{({\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3})}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}]{\mathrm{O}}_{3}$, and the high-density domain walls associated with the nanotwins have a significant contribution to the peculiar material properties near the morphotropic phase boundaries.