The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Richard T. Harley - One of the best experts on this subject based on the ideXlab platform.
-
Nonlinear Birefringence and time-resolved Kerr measurement of spin lifetimes in (110) GaAs/AlyGa1-yAs quantum wells
Physical Review B, 2010Co-Authors: P. S. Eldridge, Pavlos G. Lagoudakis, Mohamed Henini, Richard T. HarleyAbstract:We report a study of the Nonlinear Birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a Nonlinear Birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
-
Nonlinear Birefringence and time resolved kerr measurement of spin lifetimes in 110 gaas alyga1 yas quantum wells
Physical Review B, 2010Co-Authors: P. S. Eldridge, Pavlos G. Lagoudakis, Mohamed Henini, Richard T. HarleyAbstract:We report a study of the Nonlinear Birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a Nonlinear Birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
P. S. Eldridge - One of the best experts on this subject based on the ideXlab platform.
-
Nonlinear Birefringence and time-resolved Kerr measurement of spin lifetimes in (110) GaAs/AlyGa1-yAs quantum wells
Physical Review B, 2010Co-Authors: P. S. Eldridge, Pavlos G. Lagoudakis, Mohamed Henini, Richard T. HarleyAbstract:We report a study of the Nonlinear Birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a Nonlinear Birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
-
Nonlinear Birefringence and time resolved kerr measurement of spin lifetimes in 110 gaas alyga1 yas quantum wells
Physical Review B, 2010Co-Authors: P. S. Eldridge, Pavlos G. Lagoudakis, Mohamed Henini, Richard T. HarleyAbstract:We report a study of the Nonlinear Birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a Nonlinear Birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
Satoshi Tsuchida - One of the best experts on this subject based on the ideXlab platform.
-
Evolution of the Stokes parameters, polarization singularities, and optical skyrmion
Physical Review A, 2021Co-Authors: Hiroshi Kuratsuji, Satoshi TsuchidaAbstract:A physical theory is presented for polarized light from an aspect of polarization singularity. This is carried out by analyzing the evolution equation of the Stokes parameters that is derived from the Nonlinear Schr\"odinger type equation. The problem is explored from two aspects: The first is concerning the single-mode Stokes parameter that is described by the propagation distance $z$. The trajectory of the polarization singularities is simply given by the points satisfying a rule, ${S}_{3}(z)=\ifmmode\pm\else\textpm\fi{}{S}_{0}$ and 0 (${S}_{3}$ represents the third component of the Stokes parameters), which form a tubelike surface centered with the $C$ line surrounded by $L$ surfaces in the presence of the linear as well as the Nonlinear Birefringence. It is pointed out that the optical activity (or chirality) plays an ``obstacle'' to reveal the polarization singularity. As the other aspect, we consider the field theoretic aspect of the Stokes parameters, for which a special solution, called an optical skyrmion, is constructed to explicate the polarization singularity. The skyrmion forms a tube, the dynamical content of which is briefly discussed. On the basis of the work presented here, further analysis would be expected to reveal hidden aspects of polarization optics.
-
Stochastic theory of polarized light in Nonlinear birefringent media: An application to optical rotation
International Journal of Modern Physics B, 2018Co-Authors: Satoshi Tsuchida, Hiroshi KuratsujiAbstract:A stochastic theory is developed for the light transmitting the optical media exhibiting linear and Nonlinear Birefringence. The starting point is the two--component Nonlinear Schr{"o}dinger equation (NLSE). On the basis of the ansatz of "soliton" solution for the NLSE, the evolution equation for the Stokes parameters is derived, which turns out to be the Langevin equation by taking account of randomness and dissipation inherent in the birefringent media. The Langevin equation is converted to the Fokker--Planck (FP) equation for the probability distribution by employing the technique of functional integral on the assumption of the Gaussian white noise for the random fluctuation. The specific application is considered for the optical rotation, which is described by the ellipticity (third component of the Stokes parameters) alone: (i) The asymptotic analysis is given for the functional integral, which leads to the transition rate on the Poincar{'e} sphere. (ii) The FP equation is analyzed in the strong coupling approximation, by which the diffusive behavior is obtained for the linear and Nonlinear Birefringence. These would provide with a basis of statistical analysis for the polarization phenomena in Nonlinear birefringent media.
Jafar Borhanian - One of the best experts on this subject based on the ideXlab platform.
-
Nonlinear Birefringence in plasmas: Polarization dynamics, vector modulational instability, and vector solitons
Physics of Plasmas, 2014Co-Authors: Jafar BorhanianAbstract:The propagation of an elliptically polarized intense laser pulse in an unmagnetized collisionless uniform plasma is considered. A multiple scale perturbation theory is employed to show that in a weakly relativistic regime, evolution of the components of vector potential is governed by two coherently coupled Nonlinear Schrodinger (NLS) equations. A set of equations describing the evolution of Stokes parameters is derived within the continuous wave approximation and the dynamics of components of field amplitude is studied. The polarization dynamics of a pulse is investigated by means of numerical solution of the coupled NLS equations. A detailed analysis of vector modulational instability is presented and the possibility for occurrence of various kinds of vector solitary waves is addressed.
Pavlos G. Lagoudakis - One of the best experts on this subject based on the ideXlab platform.
-
Nonlinear Birefringence and time-resolved Kerr measurement of spin lifetimes in (110) GaAs/AlyGa1-yAs quantum wells
Physical Review B, 2010Co-Authors: P. S. Eldridge, Pavlos G. Lagoudakis, Mohamed Henini, Richard T. HarleyAbstract:We report a study of the Nonlinear Birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a Nonlinear Birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
-
Nonlinear Birefringence and time resolved kerr measurement of spin lifetimes in 110 gaas alyga1 yas quantum wells
Physical Review B, 2010Co-Authors: P. S. Eldridge, Pavlos G. Lagoudakis, Mohamed Henini, Richard T. HarleyAbstract:We report a study of the Nonlinear Birefringence in undoped (110)-oriented GaAs/AlGaAs quantum wells using time-resolved pump-probe Kerr spectroscopy. Due to the optical anisotropy of the (110) quantum well plane, photoexcited carriers can give rise to a Nonlinear Birefringence and so cause probe polarization rotation independent of the pump polarization, i.e., independent of spin orientation. We develop a methodology for accurate determination of electron-spin lifetimes using the Kerr technique which takes account of this phenomenon and present room-temperature measurements of wavelength and power density dependence of the spin-relaxation rate.
