Measurement of turbid media by total internal reflection with Goos-Hänchen angle displacement

IF 4.4 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2024-10-03 DOI:10.1016/j.rinp.2024.107997

Yang Miao , ChenJun Dong , Yufeng Ma , Chenghao Jia , Zeng Wang , Haibin Liu

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Abstract

Based on the Goos-Hänchen effect and the intensity attenuation of the evanescent wave penetrating and traveling, a new theoretical model of total internal reflection from the interface of turbid media is proposed and an analytical reflectance expression in a wide incident angle range is developed. The Goos-Hänchen angle displacement between the critical reflectance and the saturated reflectance is discovered. A sensor, for measuring the complex refractive index of turbid media in real-time, with divergent light source is designed. The captured images show that the light distribution reflected from the transparent medium has a sharp boundary, but for turbid media, the reflected light intensity attenuates during the transition from total to non-total internal reflection regions. It is successful and accurate that the new model fits the experimental data of the reflectance and the complex refractive index of turbid media is measured by our sensor. The results show that measuring has advantages in real-time, in situ, and with high accuracy.

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利用 Goos-Hänchen 角位移全内反射测量浑浊介质

基于 Goos-Hänchen 效应和蒸发波穿透和传播的强度衰减，提出了浊介质界面全内反射的新理论模型，并建立了宽入射角范围内的反射率解析表达式。发现了临界反射率和饱和反射率之间的 Goos-Hänchen 角位移。还设计了一种采用发散光源实时测量浑浊介质复折射率的传感器。捕捉到的图像显示，透明介质反射的光分布有一个清晰的边界，但对于浑浊介质，在从全内反射区到非全内反射区的过渡过程中，反射光强度会减弱。新模型成功且准确地拟合了反射率的实验数据，我们的传感器还测量了浑浊介质的复折射率。结果表明，测量具有实时、原位和高精度的优势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

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