Boosting optical nonlinearities in ε -near-zero plasmonic channels

Author/Creator ORCID

Date

2012-01-27

Department

Program

Citation of Original Publication

Argyropoulos, Christos; et al.; Boosting optical nonlinearities in ε -near-zero plasmonic channels; Physical Review B 85, 045129 (2012); https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.045129

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©2012 American Physical Society

Subjects

Abstract

The anomalous transmission properties of zero-permittivity ultranarrow channels are used to boost Kerr nonlinearities and achieve switching and bistable response for moderate optical intensities. Strong field enhancement, uniform all along the channel, is a typical feature of ε-near-zero supercoupling and is shown to be particularly suited to enhance nonlinear effects. This is obtained by designing narrow apertures at cutoff in a plasmonic screen. We show that this nonlinear mechanism can significantly outperform nonlinearities in traditional Fabry-Perot resonant gratings.