Tunable terahertz plasmons in graphite thin films
Optics
2021-05-18 v1
Abstract
Tunable terahertz plasmons are essential for reconfigurable photonics, which have been demonstrated in graphene through gating, though with relatively weak responses. Here, we demonstrate strong terahertz plasmons in graphite thin films via infrared spectroscopy, with dramatic tunability by even a moderate temperature change or an in-situ bias voltage. Meanwhile, through magneto-plasmon studies, we reveal that massive electrons and massless Dirac holes make comparable contributions to the plasmon response. Our study not only sets up a platform for further exploration of two-component plasmas, but also opens an avenue for terahertz modulation through electrical bias or all-optical means.
Cite
@article{arxiv.2105.07114,
title = {Tunable terahertz plasmons in graphite thin films},
author = {Qiaoxia Xing and Chaoyu Song and Chong Wang and Yuangang Xie and Shenyang Huang and Fanjie Wang and Yuchen Lei and Xiang Yuan and Cheng Zhang and Lei Mu and Yuan Huang and Faxian Xiu and Hugen Yan},
journal= {arXiv preprint arXiv:2105.07114},
year = {2021}
}