MIDAS - (NO Invited-ISP)Dynamic switching of the plasmonic beam on the spiral bull’s eye structure

(NO Invited-ISP)Dynamic switching of the plasmonic beam on the spiral bull’s eye structure

MIDAS/ISP: Nano-optics/Article #150267

Title:

(NO Invited-ISP)Dynamic switching of the plasmonic beam on the spiral bull’s eye structure

Authors:

Byoungho Lee¹, Seung-Yeol Lee¹, Il-Min Lee¹, Junghyun Park¹, Chi-Young Hwang¹

Institutions:

¹Seoul National University

Publisher:

Optical Society of America

Publication date:

Received 2011-Jul-01

PDF Article:

150267.pdf

Abstract:

A polarization dependent switchable plasmonic beaming structure composed of metallic hole surrounded by double spiral dielectric gratings is proposed. The main mechanism of the proposed structure is based on the angular momentum change of surface plasmon caused by the spiral geometry. On- and off-states of the proposed device are determined by the condition whether the rotating direction of incident polarization is the same as or opposite to the direction of the spiral rotations. Qualitative analytical expressions of the switching mechanisms and full-vectorial numerical results are presented.

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