Graphene–Metamaterial Photodetectors for Integrated Infrared Sensing

In this work we study metamaterial-enhanced graphene photodetectors operating in the mid-IR to THz. The detector element consists of a graphene ribbon embedded within a dual-metal split ring resonator, which acts like a cavity to enhance the absorption of electromagnetic radiation by the graphene ri...

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Bibliographic Details
Published inACS photonics Vol. 3; no. 6; pp. 936 - 941
Main Authors Luxmoore, Isaac. J, Liu, Peter Q, Li, Penglei, Faist, Jérôme, Nash, Geoffrey R
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 15.06.2016
Subjects
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
SEIRA spectroscopy
graphene plasmonics
terahertz
biosensing
photothermoelectric effect
infrared
metamaterial
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Summary:In this work we study metamaterial-enhanced graphene photodetectors operating in the mid-IR to THz. The detector element consists of a graphene ribbon embedded within a dual-metal split ring resonator, which acts like a cavity to enhance the absorption of electromagnetic radiation by the graphene ribbon, while the asymmetric metal contacts enable photothermoelectric detection. Detectors designed for the mid-IR demonstrate peak responsivity (referenced to total power) of ∼120 mV/W at 1500 cm–1 and are employed in the spectroscopic evaluation of vibrational resonances, thus demonstrating a key step toward a platform for integrated surface-enhanced sensing.
Bibliography:SAND2016-5489J
AC04-94AL85000
USDOE National Nuclear Security Administration (NNSA)
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.6b00226