Tunable THz absorption in graphene-based heterostructures

We investigate THz absorption properties of graphene-based heterostructures by using characteristics matrix method based on conductivity. We demonstrate that the proposed structure can lead to perfect THz absorption because of strong photon localization in the defect layer of the heterostructure. Th...

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Bibliographic Details
Published inOptics express Vol. 22; no. 24; pp. 30177 - 30183
Main Authors Deng, Xin-Hua, Liu, Jiang-Tao, Yuan, Jiren, Wang, Tong-Biao, Liu, Nian-Hua
Format Journal Article
LanguageEnglish
Published United States 01.12.2014
Subjects
Absorption, Radiation
Graphite - chemistry
Light
Models, Theoretical
Numerical Analysis, Computer-Assisted
Terahertz Radiation
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Summary:We investigate THz absorption properties of graphene-based heterostructures by using characteristics matrix method based on conductivity. We demonstrate that the proposed structure can lead to perfect THz absorption because of strong photon localization in the defect layer of the heterostructure. The THz absorption may be tuned continuously from 0 to 100% by controlling the chemical potential through a gate voltage. By adjusting the incident angle or the period number of the two PCs with respect to the graphene layer, one can tailor the maximum THz absorption value. The position of the THz absorption peaks can be tuned by changing either the center wavelength or the thicknesses ratio of the layers constituting the heterostructure. Our proposal may have potentially important applications in optoelectronic devices.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.030177