文章基本信息

标题：Photonic spin Hall effect enabled refractive index sensor using weak measurements
本地全文：下载
作者：Xinxing Zhou ; Lijuan Sheng ; Xiaohui Ling 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：1221
DOI：10.1038/s41598-018-19713-3
语种：English
出版社：Springer Nature
摘要：In this work, we theoretically propose an optical biosensor (consists of a BK7 glass, a metal film, and a graphene sheet) based on photonic spin Hall effect (SHE). We establish a quantitative relationship between the spin-dependent shift in photonic SHE and the refractive index of sensing medium. It is found that, by considering the surface plasmon resonance effect, the refractive index variations owing to the adsorption of biomolecules in sensing medium can effectively change the spin-dependent displacements. Remarkably, using the weak measurement method, this tiny spin-dependent shifts can be detected with a desirable accuracy so that the corresponding biomolecules concentration can be determined.