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Proceedings Paper

Highly tunable ultra-narrow-resonances with optical nano-antenna phased arrays in the infrared
Author(s): Shi-Qiang Li; Wei Zhou; Peijun Guo; D. Bruce Buchholz; Ziwei Qiu; John B. Ketterson; Leonidas E. Ocola; Kazuaki Sakoda; Robert P. H. Chang
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Paper Abstract

We report our recent development in pursuing high Quality-Factor (high-Q factor) plasmonic resonances, with vertically aligned two dimensional (2-D) periodic nanorod arrays. The 2-D vertically aligned nano-antenna array can have high-Q resonances varying arbitrarily from near infrared to terahertz regime, as the antenna resonances of the nanorod are highly tunable through material properties, the length of the nanorod, and the orthogonal polarization direction with respect to the lattice surface,. The high-Q in combination with the small optical mode volume gives a very high Purcell factor, which could potentially be applied to various enhanced nonlinear photonics or optoelectronic devices. The 'hot spots' around the nanorods can be easily harvested as no index-matching is necessary. The resonances maintain their high-Q factor with the change of the environmental refractive index, which is of great interest for molecular sensing.

Paper Details

Date Published: 17 August 2014
PDF: 7 pages
Proc. SPIE 9163, Plasmonics: Metallic Nanostructures and Their Optical Properties XII, 91630R (17 August 2014); doi: 10.1117/12.2061430
Show Author Affiliations
Shi-Qiang Li, Northwestern Univ. (United States)
Wei Zhou, Northwestern Univ. (United States)
Peijun Guo, Northwestern Univ. (United States)
D. Bruce Buchholz, Northwestern Univ. (United States)
Ziwei Qiu, Northwestern Univ. (United States)
John B. Ketterson, Northwestern Univ. (United States)
Leonidas E. Ocola, Argonne National Lab. (United States)
Kazuaki Sakoda, Northwestern Univ. (United States)
National Institute for Materials Science (Japan)
Robert P. H. Chang, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 9163:
Plasmonics: Metallic Nanostructures and Their Optical Properties XII
Allan D. Boardman, Editor(s)

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