Electronic modulation of infrared radiation in graphene plasmonic resonators

Victor W. Brar, Michelle C. Sherrott, Min Seok Jang, Seyoon Kim, Laura Kim, Mansoo Choi, Luke A. Sweatlock and Harry A. Atwater ()
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Victor W. Brar: Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology
Michelle C. Sherrott: Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology
Min Seok Jang: Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology
Seyoon Kim: Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology
Laura Kim: Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology
Mansoo Choi: Global Frontier Center for Multiscale Energy Systems, Seoul National University
Luke A. Sweatlock: Nanophotonics and Metamaterials Laboratory, Northrop Grumman Aerospace Systems
Harry A. Atwater: Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract All matter at finite temperatures emits electromagnetic radiation due to the thermally induced motion of particles and quasiparticles. Dynamic control of this radiation could enable the design of novel infrared sources; however, the spectral characteristics of the radiated power are dictated by the electromagnetic energy density and emissivity, which are ordinarily fixed properties of the material and temperature. Here we experimentally demonstrate tunable electronic control of blackbody emission from graphene plasmonic resonators on a silicon nitride substrate. It is shown that the graphene resonators produce antenna-coupled blackbody radiation, which manifests as narrow spectral emission peaks in the mid-infrared. By continuously varying the nanoresonator carrier density, the frequency and intensity of these spectral features can be modulated via an electrostatic gate. This work opens the door for future devices that may control blackbody radiation at timescales beyond the limits of conventional thermo-optic modulation.

Date: 2015
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DOI: 10.1038/ncomms8032

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