Limits to the Optical Response of Graphene and Two-Dimensional Materials
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Johnson_Limits to the optical.pdf
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1.11 MB
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Author(s)
Miller, Owen D.
Ilic, Ognjen
Reid, M. T. Homer
Atwater, Harry A.
Christensen, Thomas
Joannopoulos, John
Soljacic, Marin
Johnson, Steven G
Alternative Title
Limits to the Optical Response of Graphene and Two-Dimensional Materials
Date Issued
September 2017
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Citation
Miller, Owen D. et al. “Limits to the Optical Response of Graphene and Two-Dimensional Materials.” Nano Letters 17, 9 (August 2017): 5408–5415 © 2017 American Chemical Society
Version
Author's final manuscript
Abstract
Two-dimensional (2D) materials provide a platform for strong light-matter interactions, creating wide-ranging design opportunities via new-material discoveries and new methods for geometrical structuring. We derive general upper bounds to the strength of such light-matter interactions, given only the optical conductivity of the material, including spatial nonlocality, and otherwise independent of shape and configuration. Our material figure-of-merit shows that highly doped graphene is an optimal material at infrared frequencies, whereas single-atomic-layer silver is optimal in the visible. For quantities ranging from absorption and scattering to near-field spontaneous-emission enhancements and radiative heat transfer, we consider canonical geometrical structures and show that in certain cases the bounds can be approached, while in others there may be significant opportunity for design improvement. The bounds can encourage systematic improvements in the design of ultrathin broadband absorbers, 2D antennas, and near-field energy harvesters. Keywords: 2D materials; graphene; near-field optics; nonlocality; upper bounds
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/ACS.NANOLETT.7B02007
