Title

Frequency Dependent Power Efficiency Of A Nanostructured Surface Plasmon Coupler

Keywords

Devices; Optical coupling; Plasmons; Surface plasmons

Abstract

Surface plasmon (SP) excitation on an extended thin metal film via a miniature nanoparticle-enhanced grating coupler is studied experimentally using leakage radiation spectroscopy. A universally applicable method for determining the efficiency of free-space SP excitation is developed, and the efficiency of the coupler is determined. Two distinct grating excitation modes are observed, as well as a particle-mediated excitation mode. The maximum observed coupling efficiency of the structure was approximately 3.5% at 615 nm and 670 nm, corresponding to the two grating modes of the structure. (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)Nanostructured optical couplers will play a key role in future integrated plasmonic devices. This article studies the power efficiency of a normal-incidence-excited plasmon coupler that consists of a regular array of gold nanoparticles. It is shown that by taking leakage microscopy images and corresponding spectra of the excited surface plasmons, the device performance can be evaluated across a wide bandwidth. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Publication Date

10-1-2010

Publication Title

Physica Status Solidi - Rapid Research Letters

Volume

4

Issue

10

Number of Pages

280-282

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/pssr.201004258

Socpus ID

77958540599 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77958540599

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