Loss induced amplification of graphene plasmons.
Opt Lett
; 41(4): 681-4, 2016 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-26872162
ABSTRACT
This Letter introduces a new mechanism to reverse and control the effect of losses in the plasmonic systems by using a coupled parity-time symmetric graphene waveguide with complex potentials. In order to explore the uncharted properties of parity-time symmetric graphene plasmons, this Letter analytically shows the plasmonic parity-time symmetry breaking in the coupled graphene waveguide by Sommerfeld integration. This phase transition leads to the distinct spatial propagation behaviors of graphene plasmons in the exact or broken parity-time symmetric phase driven by a point source. Particularly, a loss induced plasmonic amplification, as a characteristic of exceptional point behavior, is for the first time, to the best of our knowledge, revealed in the realm of graphene plasmonics.
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MEDLINE
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En
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Opt Lett
Ano de publicação:
2016
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Article