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arXiv 2306.08099cond-mat.mes-hallphysics.optics
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结构光诱导的光电流

Photocurrents induced by structured light

A. A. Gunyaga, M. V. Durnev, S. A. Tarasenko

AI总结:

本研究建立结构光诱导二维系统光电流的微观理论,推导电子带内输运下各类光电流贡献的解析表达式,并将其用于分析涡旋光束激发的径向和方位角光电流,同时探讨了相关检测实验方案。

摘要:

光束结构操控技术的进步使得研究结构光与低维半导体系统的相互作用成为可能。我们探究了具有结构化场的非均匀辐射激发下二维系统中的光电流。除了与强度梯度相关的贡献外,光电流还包含由斯托克斯偏振参数梯度和电磁场相位梯度驱动的贡献。我们建立了结构光诱导光电流的微观理论,并推导了电子带内输运时所有光电流贡献的解析表达式。该理论被用于分析携带轨道角动量的涡旋光束激发的径向和方位角光电流,同时还讨论了检测这些光电流的可行实验方案。

英文摘要:

Advances in manipulating the structure of optical beams enable the study of interaction between structured light and low-dimensional semiconductor systems. We explore the photocurrents in two-dimensional systems excited by such inhomogeneous radiation with structured field. Besides the contribition associated with the intensity gradient, the photocurrent contains contributions driven by the gradients of the Stokes polarization parameters and the phase of the electromagnetic field. We develop a microscopic theory of the photocurrents induced by structured light and derive analytical expressions for all the photocurrent contributions at intraband transport of electrons. The theory is applied to analyze the radial and azimuthal photocurrents excited by twisted light beams carrying orbital angular momentum, and possible experiments to detect the photocurrents are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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