Measurement of refractive index of powder by prism coupler

Feng Chen; Qing Xu; Pei Zhang; Zi-Bo Zhang; Wing-Han Wong; Edwin Yue-Bun Pun; De-Long Zhang

doi:10.1063/1.5110886

Measurement of refractive index of powder by prism coupler

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

2 Scopus Citations

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Author(s)

Feng Chen
Qing Xu
Pei Zhang
Zi-Bo Zhang
Wing-Han Wong
De-Long Zhang

Related Research Unit(s)

Detail(s)

Original language	English
Article number	096101
Journal / Publication	Review of Scientific Instruments
Volume	90
Issue number	9
Online published	3 Sept 2019
Publication status	Published - Sept 2019

Link(s)

DOI	DOI https://doi.org/10.1063/1.5110886 Final Published version
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Attachment(s)	Documents 36576823.pdf Final Published version, 979 KB, PDF Publisher's Copyright Statement This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Feng Chen, Qing Xu, Pei Zhang, Zi-Bo Zhang, Wing-Han Wong, Edwin Yue-Bun Pun, and De-Long Zhang , "Measurement of refractive index of powder by prism coupler", Review of Scientific Instruments 90, 096101 (2019) and may be found at https://doi.org/10.1063/1.5110886.
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85072033754&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(31074ea3-7360-4cb6-869a-0beec7e7e2d7).html

Abstract

Refractive index of optical material of powder is measured not as easily as a bulk material. Here, the prism coupling technique in combination with the immersion method is proposed to measure the refractive index of an optical material of powder. First, the powder material to be measured was dispersed in α-bromonaphthalene (C₁₀H₇Br) liquid to form a suspension mixture. The refractive index of the mixture, together with that of pure C₁₀H₇Br, was then measured at the wavelengths of 632.8, 1311, and 1553 nm using a commercial prism coupler. From the measured index values of pure C₁₀H₇Br and powder-dispersed mixture, the refractive index of the powder material was obtained on the basis of the Maxwell-Garnett model. Microcrystal powder from a LiNbO₃ single-crystal, which has the known refractive index values, has been exemplified to demonstrate the method. The results show that the method is feasible with an accuracy of ±0.05.