相变
光子学
凝聚态物理
自旋(空气动力学)
相(物质)
自旋霍尔效应
材料科学
物理
光电子学
量子力学
自旋极化
电子
热力学
作者
Jie Cheng,Ruizhao Li,Cheng Cheng,Yalin Zhang,Shengli Liu,Peng Dong
标识
DOI:10.1088/1674-1056/ad3b85
摘要
Abstract Photonic spin Hall effect (PSHE), as a novel physical effect in light-matter interaction, provides an effective metrological method for characterizing the tiny variation in refractive index (RI). In this work, we proposed a multi-functional PSHE sensor based on VO 2 , a material that exhibits phase transition behavior. By applying thermal control, the mutual transformation on different phase states of VO 2 can be realized, which contributes to the flexible switching between multiple RI sensing tasks. When VO 2 is insulating, the ultrasensitive detection of glucose concentrations in human blood is achieved. When VO 2 is in a mixed phase, the designed structure can discriminate the normal and cancer cells with no-label and real-time monitoring. When VO 2 is metallic, the proposed PSHE sensor can act as a RI pointer for gas analytes. Compared with other multi-functional sensing devices with the complex structures, our design only consists of one analyte and two VO 2 layers, which is very simple and elegant. Therefore, the proposed VO 2 -based PSHE sensor with outstanding advantages of small size, high sensitivity, no-label, and real-time detection, offers new ideas for the research of tunable multi-functional sensors.
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