Terahertz imaging employing graphene modulator arrays

In this paper we propose and experimentally demonstrate arrays of graphene electro-absorption modulators as electrically reconfigurable patterns for terahertz cameras. The active element of these modulators consists of only single-atom-thick graphene, achieving a modulation of the THz wave reflectan...

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Bibliographic Details
Published in:Optics express 2013-01, Vol.21 (2), p.2324-2330
Main Authors: Sensale-Rodriguez, Berardi, Rafique, Subrina, Yan, Rusen, Zhu, Mingda, Protasenko, Vladimir, Jena, Debdeep, Liu, Lei, Xing, Huili Grace
Format: Article
Language:English
Subjects:
Equipment Design
Equipment Failure Analysis
Graphite - chemistry
Surface Plasmon Resonance - instrumentation
Telecommunications - instrumentation
Terahertz Radiation
Transducers
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Summary:In this paper we propose and experimentally demonstrate arrays of graphene electro-absorption modulators as electrically reconfigurable patterns for terahertz cameras. The active element of these modulators consists of only single-atom-thick graphene, achieving a modulation of the THz wave reflectance > 50% with a potential modulation depth approaching 100%. Although the prototype presented here only contains 4x4 pixels, it reveals the possibility of developing reliable low-cost video-rate THz imaging systems employing single detector.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.002324