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Design of Plasmonic Racetrack Resonators with a Trench Structure
Hiroyuki Okamoto,
Kenzo Yamaguchi1,
Masanobu Haraguchi2,
Toshihiro Okamoto2, and
Cheng Sun3
Department of Systems and Control Engineering, Anan National College of Technology, Anan, Tokushima 774-0017, Japan
1Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, Takamatsu 761-0396, Japan
2Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, Tokushima 770-8506, Japan
3Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208-3111, U.S.A.
(Received February 27, 2011; accepted June 15, 2011; published online September 20, 2011)
The authors present a plasmonic racetrack resonator with a trench structure. The depth of the structure and the length of the racetrack straightaways both significantly influence the characteristics of the plasmonic racetrack resonator. The optimum depth of the structure and length of the straightaways have been numerically evaluated by the finite-difference time-domain method. The quality factor of the plasmonic racetrack resonator is 38. As compared to the output intensity of a plasmonic ring resonator with a trench structure, the output intensity of the proposed plasmonic racetrack resonator is greater by one order of magnitude.
URL:
http://jjap.jsap.jp/link?JJAP/50/092201/
DOI: 10.1143/JJAP.50.092201
PACS: 73.20.Mf, 71.36.+c, 02.70.Bf
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