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Extraordinary control of terahertz beam reflectance in graphene electro-absorption modulators.

Authors
  • Sensale-Rodriguez, Berardi
  • Yan, Rusen
  • Rafique, Subrina
  • Zhu, Mingda
  • Li, Wei
  • Liang, Xuelei
  • Gundlach, David
  • Protasenko, Vladimir
  • Kelly, Michelle M
  • Jena, Debdeep
  • Liu, Lei
  • Xing, Huili Grace
Type
Published Article
Journal
Nano Letters
Publisher
American Chemical Society
Publication Date
Sep 12, 2012
Volume
12
Issue
9
Pages
4518–4522
Identifiers
DOI: 10.1021/nl3016329
PMID: 22862777
Source
Medline
License
Unknown

Abstract

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.

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