Excitation of bound plasmons along nanoscale stripe waveguides: A comparison of end and grating coupling techniques

Perera, C.S., Vernon, K.C., Funston, A.M., Cheng, H., Eftekhari, F., & Davis, T.J. (2015) Excitation of bound plasmons along nanoscale stripe waveguides: A comparison of end and grating coupling techniques. Optics Express, 23(8), pp. 10188-10197.

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Abstract

In this paper we excite bound long range stripe plasmon modes with a highly focused laser beam. We demonstrate highly confined plasmons propagating along a 50 μm long silver stripe 750 nm wide and 30 nm thick. Two excitation techniques were studied: focusing the laser spot onto the waveguide end and focusing the laser spot onto a silver grating. By comparing the intensity of the out-coupling photons at the end of the stripe for both grating and end excitation we are able to show that gratings provide an increase of a factor of two in the output intensity and thus out-coupling of plasmons excited by this technique are easier to detect. Authors expect that the outcome of this paper will prove beneficial for the development of passive nano-optical devices based on stripe waveguides, by providing insight into the different excitation techniques available and the advantages of each technique.

Impact and interest:

2 citations in Scopus
2 citations in Web of Science®
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ID Code: 83671
Item Type: Journal Article
Refereed: Yes
DOI: 10.1364/OE.23.010188
ISSN: 1094-4087
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Funding:
Copyright Owner: Copyright 2015 Optical society of America
Deposited On: 19 Apr 2015 22:44
Last Modified: 12 Sep 2016 17:07

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