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王乔
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副教授   博士生导师   硕士生导师

性别: 女

毕业院校: 大连理工大学

学位: 博士

所在单位: 物理学院

学科: 光学

办公地点: 物理学院331室

联系方式: wangqiao@dlut.edu.cn

电子邮箱: wangqiao@dlut.edu.cn

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A subwavelength metal-grating assisted sensor of Kretschmann style for investigating the sample with high refractive index

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论文类型: 期刊论文

发表时间: 2016-03-01

发表刊物: CHINESE PHYSICS B

收录刊物: SCIE、EI、ISTIC

卷号: 25

期号: 3

ISSN号: 1674-1056

关键字: surface plasmons; sensing; finite-difference time-domain method

摘要: In this paper, a subwavelength metal-grating assisted sensor of Kretschmann style that is capable of detecting the sample with a refractive index higher than that of the substrate is proposed. The sensor configuration is similar to the traditional Kretschmann structure, but the metal film is pattered into a grating. As a TM-polarized laser beam impinges from the substrate, a resonant dip point in reflectance curve is produced at a certain incident angle. Our studies indicate that the sensing sensitivity and resolution are affected by the grating's gap and period, and after these parameters have been optimized, a sensing sensitivity of 51.484 degrees/RIU is obtained with a slightly changing resolution.

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