论文标题
拉曼光子效应：非弹性光散射处的光电流
Raman Photogalvanic Effect: photocurrent at inelastic light scattering
论文作者
论文摘要
从理论上讲，我们表明在非中心对称介质的透明区域中传播的电磁波可以诱导直流电流。效果的起源是系统中的自由载体对光的拉曼散射。由于光子散射，电子经历实际量子跃迁，导致其各向异性动量分布形成以及电子波袋的移位，从而引起稳态的光电流。我们提出了重点介绍两种特定情况的拉曼光子效应（RPGE）的显微镜理论：（i）散装陀螺仪的陀螺仪半导体的通用情况，以及（ii）量子井结构，其中光散布在间间band频带激发。我们揭示了在光吸收时预测的RPGE和传统的光负效应的关系。
We show theoretically that electromagnetic waves propagating in the transparency region of a non-centrosymmetric medium can induce a dc electric current. The origin of the effect is the Raman scattering of light by free carriers in the system. Due to the photon scattering, electrons undergo real quantum transitions resulting in the formation of their anisotropic momentum distribution and in shifts of electronic wavepackets giving rise to a steady state photocurrent. We present microscopic theory of the Raman Photogalvanic effect (RPGE) focusing on two specific situations: (i) generic case of a bulk gyrotropic semiconductor and (ii) a quantum well structure where the light is scattered by intersubband excitations. We uncover the relation of the predicted RPGE and the traditional photogalvanic effect at the light absorption.
