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Spectroscopic Properties of Gold Curvilinear Nanorod Arrays

Metamaterials Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
RIES, Hokkaido University, N21W10, Kita-Ward, Sapporo, Hokkaido 001-0021, Japan
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan
Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Author to whom correspondence should be addressed.
Photonics 2016, 3(2), 18;
Received: 4 March 2016 / Revised: 2 April 2016 / Accepted: 4 April 2016 / Published: 8 April 2016
(This article belongs to the Special Issue 3D- and 2D-Nanofabrication for Photonic Devices)
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We designed and fabricated gold curvilinear nanorod periodical arrays using microfabrication techniques. The gold curvilinear nanorods had two distinct resonant peaks in the near-infrared region between 1630 nm and 3000 nm. Similar peak was observed in gold straight nanorods at specific lengths. At lengths identical to the arc length of the curvilinear nanorod, the peak was in the relative range of 3000 nm, which corresponds to the longitudinal plasmon mode (L-mode). At lengths identical to half of the arc length of the curvilinear nanorod, the peak was close to 1630 nm. Plasmon resonant peaks were tunable in the infrared region by changing the arc length of the curve, the line width, and distance between the curvilinear nanorods. In particular, when two curvilinear nanorods were closely packed in a range of less than 100 nm, the peak wavelength of curvilinear nanorod was shifted due to the plasmonic coupling of each mode. View Full-Text
Keywords: 2D Plasmonics; gold curvilinear nanorod; nanogap 2D Plasmonics; gold curvilinear nanorod; nanogap

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Yokota, Y.; Ueno, K.; Misawa, H.; Tanaka, T. Spectroscopic Properties of Gold Curvilinear Nanorod Arrays. Photonics 2016, 3, 18.

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