Extraordinary Control of Terahertz Beam Reflectance in Graphene Electro-absorption Modulators
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- 作者：Berardi Sensale-Rodriguez ; Rusen Yan ; Subrina Rafique ; Mingda Zhu ; Wei Li ; Xuelei Liang ; David Gundlach ; Vladimir Protasenko ; Michelle M. Kelly ; Debdeep Jena ; Lei Liu ; Huili Grace Xing
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：September 12, 2012
- 年：2012
- 卷：12
- 期：9
- 页码：4518-4522
- 全文大小：305K
- 年卷期：v.12,no.9(September 12, 2012)
- ISSN：1530-6992
文摘
We demonstrate a graphene-based electro-absorption modulator achieving extraordinary control of terahertz reflectance. By concentrating the electric field intensity in an active layer of graphene, an extraordinary modulation depth of 64% is achieved while simultaneously exhibiting low insertion loss (2 dB), which is remarkable since the active region of the device is atomically thin. This modulator performance, among the best reported to date, indicates the enormous potential of graphene for terahertz reconfigurable optoelectronic devices.