Universal switching of plasmonic signals using optical resonator modes

Light, Science & Applications
Cillian Pt McPolinAnatoly V Zayats

Abstract

We propose and investigate, both experimentally and theoretically, a novel mechanism for switching and modulating plasmonic signals based on a Fano interference process, which arises from the coupling between a narrow-band optical Fabry-Pérot cavity and a surface plasmon polariton (SPP) source. The SPP wave emitted from the cavity is actively modulated in the vicinity of the cavity resonances by altering the cavity Q-factor and/or resonant frequencies. We experimentally demonstrate dynamic SPP modulation both by mechanical control of the cavity length and all-optically by harnessing the ultrafast nonlinearity of the Au mirrors that form the cavity. An electro-optical modulation scheme is also proposed and numerically illustrated. Dynamic operation of the switch via mechanical means yields a modulation in the SPP coupling efficiency of ~80%, while the all-optical control provides an ultrafast modulation with an efficiency of 30% at a rate of ~0.6 THz. The experimental observations are supported by both analytical and numerical calculations of the mechanical, all-optical and electro-optical modulation methods.

References

May 21, 2010·Nano Letters·Eyal FeigenbaumHarry A Atwater
Aug 25, 2010·Nature Materials·Boris Luk'yanchukChong Tow Chong
Oct 25, 2011·Advanced Materials·Mengxin RenNikolay I Zheludev
Jan 28, 2012·ACS Nano·Yan FrancescatoStefan A Maier
Aug 29, 2012·Nano Letters·Wei-Shun ChangStephan Link
Mar 15, 2013·Scientific Reports·Jianjun ChenQihuang Gong
Apr 20, 2013·Science·Francisco J Rodríguez-FortuñoAnatoly V Zayats
Jun 6, 2013·Optics Express·Jianhong ZhouQing Chang
Jul 22, 2015·Nature Communications·Andres D NeiraAnatoly V Zayats

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Citations

Jun 30, 2019·Optics Express·Jian Zhang, Xinping Zhang
Apr 28, 2018·Nanoscale·A S ZaloginaI V Shadrivov

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Methods Mentioned

BETA
light scattering

Software Mentioned

COMSOL Multiphysics

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