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Title

Surface plasmon resonances in periodic and random patterns of gold nano-disks for broadband light harvesting

Author(s)

Nishijima, Yoshiaki;  Rosa, Lorenzo;  Juodkazis, Saulius

Abstract

We analyze the localized surface plasmon resonance spectra of periodic square lattice arrays of gold nano-disks, and we describe numerically and experimentally the effect of disorder on resonance width, spectrum, and EM field enhancement in increasingly randomized patterns. The periodic structure shows a narrower and stronger extinction peak, conversely we observe an increase of up to (1-2)x10 2 times enhancement as the disorder is gradually introduced. This allows for simpler, lower resolution fabrication, cost-effective in light harvesting for solar cell and sensing applications. We show that dipole-dipole interactions contribute to diffract light parallel to the surface as a mean of long-range coupling between the nano-disks.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Optics Express, Vol. 20, no. 10 (May 2012), pp. 11466-11477

Publication year

2012

FOR Code(s)

0205 Optical Physics;  0906 Electrical and Electronic Engineering;  1005 Communications Technologies

Keyword(s)

Broadband light harvesting;  Gold nano-disks;  Periodic square lattice arrays;  Random patterns;  Surface plasmon resonances

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://dx.doi.org/10.1364/oe.20.011466

Copyright

Copyright © 2012 Optical Society of America. The published version is reproduced in accordance with the copyright policy of the publisher. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/oe.20.011466. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Additional information

Supported by the Yokohama Academic Foundation and the Research Foundation for Opt-Science and Technology.

Full text

Peer reviewed