Approaching total absorption at near infrared in a large area monolayer graphene by critical coupling

We demonstrate experimentally close to total absorption in monolayer graphene based on critical coupling with guided resonances in transfer printed photonic crystal Fano resonance filters at near infrared. Measured peak absorptions of 35% and 85% were obtained from cavity coupled monolayer graphene...

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Bibliographic Details
Published in:Applied physics letters 2014-11, Vol.105 (18), p.181105
Main Authors: Liu, Yonghao, Chadha, Arvinder, Zhao, Deyin, Piper, Jessica R., Jia, Yichen, Shuai, Yichen, Menon, Laxmy, Yang, Hongjun, Ma, Zhenqiang, Fan, Shanhui, Xia, Fengnian, Zhou, Weidong
Format: Article
Language:English
Subjects:
ABSORPTION
Applied physics
CAVITY RESONATORS
COMPACTS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Coupled modes
COUPLING
CRYSTALS
FILTERS
GRAPHENE
Infrared filters
INTERACTIONS
MATERIALS
Monolayers
NEAR INFRARED RADIATION
OPTICAL EQUIPMENT
Photonic crystals
PHOTONS
Reflectors
RESONANCE
TWO-DIMENSIONAL CALCULATIONS
VISIBLE RADIATION
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Summary:We demonstrate experimentally close to total absorption in monolayer graphene based on critical coupling with guided resonances in transfer printed photonic crystal Fano resonance filters at near infrared. Measured peak absorptions of 35% and 85% were obtained from cavity coupled monolayer graphene for the structures without and with back reflectors, respectively. These measured values agree very well with the theoretical values predicted with the coupled mode theory based critical coupling design. Such strong light-matter interactions can lead to extremely compact and high performance photonic devices based on large area monolayer graphene and other two–dimensional materials.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4901181