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
开通时间: ..
最后更新时间: ..
点击次数:
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.