Enhanced optical bistability with film-coupled plasmonic nanocubes

Colloidally synthesized nanocubes strongly coupled to conducting films hold great promise for enhancing different nonlinear optical processes. They exhibit a robust and sensitive scattering response that can be easily controlled by their geometrical and material parameters. Strong local field enhanc...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (6)
Main Authors: Argyropoulos, Christos, Ciracì, Cristian, Smith, David R.
Format: Article
Language:English
Subjects:
Applied physics
Optical bistability
Optical switching
Scattering
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Summary:Colloidally synthesized nanocubes strongly coupled to conducting films hold great promise for enhancing different nonlinear optical processes. They exhibit a robust and sensitive scattering response that can be easily controlled by their geometrical and material parameters. Strong local field enhancement is generated at the gap regions between the nanocubes and the metallic film. We show that strong optical bistability and all-optical switching behavior can be obtained by loading these nanogaps with Kerr nonlinear materials. Relatively low input intensities are required to obtain these nonlinear effects. The proposed design can lead to efficient, low-power, and ultrafast all-optical memories and scattering nanoswitches.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4866048