Dynamic control of plasmonic beams

Optics Letters
Dror Weisman, Ady Arie

Abstract

We experimentally demonstrate dynamic, electrically controlled shaping of plasmonic beams, propagating at the boundary between a metal and a dielectric, by using the thermo-optic effect. The concept is based on selectively heating a specific region in which the plasmonic beam passes by injecting electrical current to an isolated metal layer. This leads to transverse modulation of the wavefront through the thermal dispersion of the dielectric layer above this metal region. We demonstrate two active plasmonic devices: a plasmonic mode converter between the fundamental and first-order Hermite-Gauss modes and a tunable plasmonic lens with a dynamically varying focal length.

References

Aug 15, 2003·Nature·William L BarnesThomas W Ebbesen
May 24, 2008·Nature Materials·Jeffrey N AnkerRichard P Van Duyne
Feb 23, 2010·Optics Express·Jacek GosciniakAlain Dereux
Sep 14, 2012·Scientific Reports·Sotirios PapaioannouNikos Pleros
Dec 20, 2012·Reports on Progress in Physics·Zhanghua Han, Sergey I Bozhevolnyi
Apr 25, 2015·Nature Communications·João ValenteNikolay I Zheludev
Apr 30, 2017·Physical Review Letters·Dror WeismanAdy Arie
Jul 20, 2017·ACS Sensors·Jean-Francois Masson

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