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Journal of Nanophotonics

Cavity-enhanced mid-infrared absorption in perforated graphene
Author(s): Alexander Y. Zhu; Fei Yi; Jason C. Reed; Ertugrul Cubukcu
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Paper Abstract

Graphene’s unique electronic structure due to its two-dimensional nature results in numerous advantageous properties, such as highly tunable chemical potential and the ability to support highly confined surface plasmons with exceptionally long lifetimes. In the context of optical absorbers, we theoretically calculate, using both analytical and numerical techniques, that the coupling of a continuous monolayer of perforated graphene to simple optical cavities results in greatly enhanced absorption in the mid-infrared regime due to graphene surface plasmons, with tunability of the resonance peak by more than its full width at half maximum. We identified and studied two distinct cases: quarter wavelength Fabry–Perot cavities which result in near-unity absorption, and deeply subwavelength cavities which enhance the universal graphene absorption approximately fourfold. The structural simplicity and large spectral tunability of the proposed designs render them applicable to infrared modulators, sensors, and bolometers.

Paper Details

Date Published: 16 June 2014
PDF: 9 pages
J. Nanophoton. 8(1) 083888 doi: 10.1117/1.JNP.8.083888
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
Alexander Y. Zhu, Univ. of Pennsylvania (United States)
Fei Yi, Univ. of Pennsylvania (United States)
Jason C. Reed, Univ. of Pennsylvania (United States)
Ertugrul Cubukcu, Univ. of Pennsylvania (United States)

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