Boosting optical nonlinearities in near zero plasmonic channels
Christos Argyropoulos, Pai-Yen Chen, Giuseppe D’Aguanno, Nader Engheta, Andrea Al`u
PHYSICAL REVIEW B
Volume: 85, Issue: 4, 4 January 2012
045129-1 - 045129-5
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 e-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-P´erot resonant gratings.
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