Sensitivity Enhanced Refractive Index Sensor by Reducing the Influence of In-Plane Wavevector in Photonic Spin Hall Effect

Sensitivity Enhanced Refractive Index Sensor by Reducing the Influence of In-Plane Wavevector in Photonic Spin Hall Effect
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通过减少光子自旋霍尔效应中面内波矢的影响来提高灵敏度的折射率传感器

DOI:
10.1109/jphot.2018.2873213
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发表时间:
2018-10
影响因子:
2.4
通讯作者:
Zhang Zhiyou
Zhang Zhiyou
中科院分区:
工程技术4区
文献类型:
--
作者:
Sheng Lijuan;Xie Linguo;Luo Huiling;Zhou Xinxing;Ling Xiaohui;Zhang Zhiyou

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光子自旋霍尔效应(SHE)可以作为一种有效的传感器,用于测量传感介质的折射率(RI)变化。如何进一步提高其灵敏度是一个非常有趣和重要的问题。在本文中,我们从理论上提出了一种弱测量方法,通过减少面内波矢的影响来提高基于光子SHE-RI传感器的灵敏度。特别值得注意的是,我们的结果表明,所提出的配置的灵敏度达到约3.16 × 10−7 RIU/μ m,这表明与传统的相比,近两个数量级的提高。值得注意的是,这种方法可以适用于大范围的RI变化的传感介质,同时保持高灵敏度。
Photonic spin Hall effect (SHE) can be an effective sensor for determining the refractive index (RI) variation of a sensing medium. How to further improve its sensitivity is a very interesting and important issue. In this paper, we theoretically propose a weak measurement method for enhancing the sensitivity of the photonic SHE-based RI sensor by reducing the influence of the in-plane wavevector. Of particular interest, our results indicate that the sensitivity of the presented configuration reaches about 3.16 × 10−7 RIU/μ m which shows nearly two orders of magnitude improvement compared with the conventional one. Remarkably, this method can be applied for wide range of RI variation of the sensing medium while keeping the high sensitivity.
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