arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.01035cond-mat.mes-hallcond-mat.mtrl-sci
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具有各向异性天线的等离子体太赫兹干涉仪

Helicity sensitive plasmonic teraherts interferometer

Moscow Institute of Physics and Technology (State University)(莫斯科物理技术学院(国立大学));Physics Department, Moscow State University of Education (MSPU)(莫斯科教育国立大学物理系);Terahertz Center, University of Regensburg(雷根斯堡大学太赫兹中心);Ioffe Institute(约费研究所);National Research University Higher School of Economics(国立高等经济大学)

Y. Matyushkin, S. Danilov, M. Moskotin, V. Belosevich, N. Kaurova, M. Rybin, E. Obraztsova, G. Fedorov, I. Gorbenko, V. Kachorovskii, S. Ganichev

AI总结:

本文提出一种基于石墨烯场效应晶体管的等离子体干涉仪,利用等离子体干涉机制实现圆偏振光到直流光电压的转换,用于测量两个任意相移光信号的相位差。

摘要:

等离子体干涉仪是一种快速增长的研究领域,具有在太赫兹频段应用的巨大潜力。本文探讨了一种基于石墨烯场效应晶体管连接特殊设计天线的等离子体干涉仪。关键结果是观察到通过等离子体干涉机制,圆偏振辐射转化为直流光电压,该过程对偏振旋向和相位敏感:两个等离子体波在晶体管源极和漏极部分被激发并在通道内干涉。通过使用不对称天线配置实现了等离子体波之间的偏振旋向敏感相位移。直流信号在偏振旋向反转时符号改变。建议的等离子体干涉仪能够测量两个任意相移的光信号之间的相位差。观察到的效果为在二维材料中等离子体波激发的相位敏感探测开辟了广阔的道路。

英文摘要:

Plasmonic interferometry is a rapidly growing area of research with a huge potential for applications in terahertz frequency range. In this Letter, we explore a plasmonic interferometer based on graphene Field Effect Transistor connected to specially designed antennas. As a key result, we observe helicity- and phase-sensitive conversion of circularly-polarized radiation into dc photovoltage caused by the plasmon-interference mechanism: two plasma waves, excited at the source and drain part of the transistor interfere inside the channel. The helicity sensitive phase shift between these waves is achieved by using an asymmetric antenna configuration. The dc signal changes sign with inversion of the helicity. Suggested plasmonic interferometer is capable for measuring of phase difference between two arbitrary phase-shifted optical signals. The observed effect opens a wide avenue for phase-sensisitve probing of plasma wave excitations in two-dimensional materials.

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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