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Graphene-enabled electrically controlled terahertz spatial light modulators
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Date
2015-05-01
Author
Kakenov, Nurbek
Takan, Taylan
ÖZKAN, VEDAT ALİ
Balci, Osman
Polat, Emre O.
Altan, Hakan
KOCABAŞ, COŞKUN
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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In this Letter, we demonstrate a broadband terahertz (THz) spatial light modulator using 5 x 5 arrays of large area graphene supercapacitors. Our approach relies on controlling spatial charge distribution on a passive matrix array of patterned graphene electrodes. By changing the voltage bias applied to the rows and columns, we were able to pattern the THz transmittance through the device with high modulation depth and low operation voltage. We anticipate that the simplicity of the device architecture with high contrast THz modulation over a broad spectral range could provide new tools for THz imaging and communication systems. (C) 2015 Optical Society of America
Subject Keywords
Nanomaterials
,
Terahertz imaging
,
Modulators
,
Optoelectronics
URI
https://hdl.handle.net/11511/35130
Journal
OPTICS LETTERS
DOI
https://doi.org/10.1364/ol.40.001984
Collections
Department of Physics, Article