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用于太赫兹辐射探测的激子极化激元测辐射热计。

An exciton-polariton bolometer for terahertz radiation detection.

作者信息

Paschos G G, Liew T C H, Hatzopoulos Z, Kavokin A V, Savvidis P G, Deligeorgis G

机构信息

Department of Materials Science & Technology, University of Crete, 71003, Heraklion, Greece.

FORTH IESL, Heraklion, 71110, Crete, Greece.

出版信息

Sci Rep. 2018 Jul 4;8(1):10092. doi: 10.1038/s41598-018-28197-0.

Abstract

We experimentally investigate the feasibility of a bolometric device based on exciton-polaritons. Initial measurements presented in this work show that heating - via thermal expansion and bandgap renormalization - modifies the exciton-polariton propagation wavevector making exciton-polaritons propagation remarkably sensitive to thermal variations. By theoretical simulations we predict that using a single layer graphene absorbing layer, a THz bolometric sensor can be realized by a simple exciton-polariton ring interferometer device. The predicted sensitivity is comparable to presently existing THz bolometric devices with the convenience of being a device that inherently produces an optical signal output.

摘要

我们通过实验研究了基于激子极化激元的测辐射热计装置的可行性。这项工作中给出的初步测量结果表明,通过热膨胀和带隙重整化产生的热效应会改变激子极化激元的传播波矢,使得激子极化激元的传播对热变化非常敏感。通过理论模拟,我们预测使用单层石墨烯吸收层,可通过一个简单的激子极化激元环形干涉仪装置实现太赫兹测辐射热传感器。预测的灵敏度与目前现有的太赫兹测辐射热装置相当,且该装置具有固有产生光信号输出的便利性。

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