Theoretical investigation of a highly sensitive refractive-index sensor based on TM0waveguide mode resonance excited in an asymmetric metal-cladding dielectric waveguide structure

doi:10.3390/s19051187

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	Theoretical investigation of a highly sensitive refractive-index sensor based on TM0waveguide mode resonance excited in an asymmetric metal-cladding dielectric waveguide structure
	Wang, Xiangxian 1; Wu, Xiaoxiong 1; Zhu, Jiankai 1; Pang, Zhiyuan 1; Yang, Hua 1; Qi, Yunping 2
刊名	Sensors (Switzerland)
	2019-03-01
卷号	19 期号:5
关键词	Optical waveguides Plasmons Refractometers Resonance Surface plasmon resonance Waveguide components Figure of merits Refractive index sensor Resonance wavelengths Sensitivity Waveguide mode
ISSN号	14248220
DOI	10.3390/s19051187
英文摘要	This study proposes a highly sensitive refractive-index (RI) sensor based on a TM0 waveguide mode resonance excited in an asymmetric metal-cladding dielectric waveguide structure, where the analyte serves as the guiding layer. By scanning the wavelength at fixed angles of incidence, the reflection spectra of the sensor were obtained. The results showed that the resonance wavelength redshifted dramatically with increases in the analyte RI, which indicates that this approach can be used to sense both the resonance wavelength and the analyte RI. Based on this approach, we investigated the sensing properties, including the sensitivity and figure of merit, at fixed incident angles of 60° and 45°, at which the sensitivity of the sensor reached 7724.9 nm/RIU (refractive index units) and 1339 nm/RIU, respectively. Compared with surface plasmon resonance sensors, which are based on a similar structure, the proposed sensor can accept a more flexible range of incident angles and a wider sensing range of analyte RI. This approach thus has tremendous potential for use in numerous sensing domains, such as biochemical and medical analyses. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
资助项目	Undergraduate Innovation Training Program of Lanzhou University of Technology[DC2018004]
WOS研究方向	Chemistry ; Engineering ; Instruments & Instrumentation
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000462540400206
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114041]
专题	理学院
通讯作者	Wang, Xiangxian
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China 2.Northwest Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiangxian,Wu, Xiaoxiong,Zhu, Jiankai,et al. Theoretical investigation of a highly sensitive refractive-index sensor based on TM0waveguide mode resonance excited in an asymmetric metal-cladding dielectric waveguide structure[J]. Sensors (Switzerland),2019,19(5).
APA	Wang, Xiangxian,Wu, Xiaoxiong,Zhu, Jiankai,Pang, Zhiyuan,Yang, Hua,&Qi, Yunping.(2019).Theoretical investigation of a highly sensitive refractive-index sensor based on TM0waveguide mode resonance excited in an asymmetric metal-cladding dielectric waveguide structure.Sensors (Switzerland),19(5).
MLA	Wang, Xiangxian,et al."Theoretical investigation of a highly sensitive refractive-index sensor based on TM0waveguide mode resonance excited in an asymmetric metal-cladding dielectric waveguide structure".Sensors (Switzerland) 19.5(2019).