An Ultrasensitive and Multispectral Refractive Index Sensor Design Based on Quad-Supercell Metamaterials
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- 作者：Shuyuan Xiao ; Tao Wang ; Yuebo Liu ; Xu Han ; Xicheng Yan
- 关键词：Metamaterials ; Surface plasmon resonance ; Biological sensing and sensors
- 刊名：Plasmonics
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：12
- 期：1
- 页码：185-191
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Biotechnology; Nanotechnology; Biophysics and Biological Physics; Biochemistry, general;
- 出版者：Springer US
- ISSN：1557-1963
- 卷排序：12
文摘
Plasmonic metamaterials support the localized surface plasmon resonance (LSPR), which is sensitive to the change in the dielectric environment and highly desirable for ultrasensitive biochemical sensing. In this work, a novel design of supercell metamaterials of four mutually rotating split ring resonators (SRRs) is proposed, where simultaneous excitations of odd ( N = 1 and N = 3) and even ( N = 2) resonance modes are realized due to additional asymmetry from the rotation and show insensitivity to two orthogonal polarizations. The full utilization of these three resonance dips show bright prospects for multispectral application. As a refractive index (RI) sensor, ultrahigh sensitivities ∼1000 nm/RIU for LC mode ( N = 1) and ∼500 nm/RIU for plasmon mode ( N = 2) are obtained in the near infrared (NIR) spectrum.