Extraordinary Control of Terahertz Beam Reflectance in Graphene Electro-absorption Modulators
Nano Letters2012Vol. 12(9), pp. 4518–4522
Citations Over TimeTop 1% of 2012 papers
Berardi Sensale‐Rodriguez, Rusen Yan, Subrina Rafique, Mingda Zhu, Wei Li, Xuelei Liang, David J. Gundlach, Vladimir Protasenko, Michelle M. Kelly, Debdeep Jena, Lei Liu, Huili Grace Xing
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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