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Sensors 2017, 17(3), 585; doi:10.3390/s17030585

Tunable Plasmonic Band-Pass Filter with Dual Side-Coupled Circular Ring Resonators

1
School of Science, Nanjing University of Science & Technology, Nanjing 210094, China
2
School of Mathematics & Physics Science, Xuzhou University of Technology, Xuzhou 221018, China
3
School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
4
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 28 January 2017 / Revised: 7 March 2017 / Accepted: 7 March 2017 / Published: 13 March 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [2557 KB, uploaded 14 March 2017]   |  

Abstract

A wavelength band-pass filter with asymmetric dual circular ring resonators in a metal-insulator-metal (MIM) structure is proposed and numerically simulated. For the interaction of the local discrete state and the continuous spectrum caused by the side-coupled resonators and the baffle, respectively, the transmission spectrum exhibits a sharp and asymmetric profile. By adjusting the radius and material imbedded in one ring cavity, the off-to-on plasmon-induced absorption (PIA) optical response can be tunable achieved. In addition, the structure can be easily extended to other similar compact structures to realize the filtering task. Our structures have important potential applications for filters and sensors at visible and near-infrared regions. View Full-Text
Keywords: integrated optics devices; waveguides; plasmonics; metal-insulator-metal (MIM); sensors integrated optics devices; waveguides; plasmonics; metal-insulator-metal (MIM); sensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, D.; Wang, J.; Zhang, F.; Pan, Y.; Lu, J.; Ni, X. Tunable Plasmonic Band-Pass Filter with Dual Side-Coupled Circular Ring Resonators. Sensors 2017, 17, 585.

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