Total absorption by degenerate critical coupling

We consider a mirror-symmetric resonator with two ports. We show that, when excited from a single port, complete absorption can be achieved through critical coupling to degenerate resonances with opposite symmetry. Moreover, any time two resonances with opposite symmetry are degenerate in frequency...

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Published in:Applied physics letters 2014-06, Vol.104 (25)
Main Authors: Piper, Jessica R., Liu, Victor, Fan, Shanhui
Format: Article
Language:English
Subjects:
ABSORPTION
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Coupling
CRYSTALS
GRAPHENE
NEAR INFRARED RADIATION
Photonic crystals
RESONANCE
RESONATORS
SYMMETRY
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container_title Applied physics letters
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Liu, Victor
Fan, Shanhui
description We consider a mirror-symmetric resonator with two ports. We show that, when excited from a single port, complete absorption can be achieved through critical coupling to degenerate resonances with opposite symmetry. Moreover, any time two resonances with opposite symmetry are degenerate in frequency and absorption is always significantly enhanced. In contrast, when two resonances with the same symmetry are nearly degenerate, there is no absorption enhancement. We numerically demonstrate these effects using a graphene monolayer on top of a photonic crystal slab, illuminated from a single side in the near-infrared.
doi_str_mv 10.1063/1.4885517
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP Journals (American Institute of Physics)
subjects ABSORPTION
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Coupling
CRYSTALS
GRAPHENE
NEAR INFRARED RADIATION
Photonic crystals
RESONANCE
RESONATORS
SYMMETRY
title Total absorption by degenerate critical coupling
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