Rapid Research Letter

Frequency dependent power efficiency of a nanostructured surface plasmon coupler

  1. Amitabh Ghoshal,
  2. Pieter G. Kik*

Article first published online: 13 JUL 2010

DOI: 10.1002/pssr.201004258

Issue

physica status solidi (RRL) - Rapid Research Letters

physica status solidi (RRL) - Rapid Research Letters

Special Issue: Plasmonics and Nanophotonics

Volume 4, Issue 10, pages 280–282, October 2010

Additional Information

How to Cite

Ghoshal, A. and Kik, P. G. (2010), Frequency dependent power efficiency of a nanostructured surface plasmon coupler. physica status solidi (RRL) - Rapid Research Letters, 4: 280–282. doi: 10.1002/pssr.201004258

Author Information

  1. CREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL 32816, USA

*Phone: +31 407 823 4622, Fax: +31 407 823 6880

Publication History

  1. Issue published online: 13 JUL 2010
  2. Article first published online: 13 JUL 2010
  3. Manuscript Accepted: 8 JUL 2010
  4. Manuscript Revised: 7 JUL 2010
  5. Manuscript Received: 8 JUN 2010

Funded by

  • National Science Foundation (CAREER Award). Grant Number: ECCS-0644228

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Keywords:

  • surface plasmons;
  • plasmons;
  • optical coupling;
  • devices

Graphical Abstract

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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.

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)

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