Methods for determining the refractive indices and thermo-optic coefficients of chalcogenide glasses at MIR wavelengths

作     者：Fang, Y. Furniss, D. Jayasuriya, D. Parnell, H. Tang, Z.Q. Gibson, D. Bayya, S. Sanghera, J. Seddon, A.B. Benson, T.M. 

作者机构：Mid-Infrared Photonics Group George Green Institute for Electromagnetics Research Faculty of Engineering University of Nottingham University Park NottinghamNG7 2RD United Kingdom Now Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics Collaborative Innovation Center for Optoelectronic Science and Technology And Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen University Shenzhen518060 China Now at ThorLabs 1 St. Thomas Place ElyCB7 4EX United Kingdom  Rustat House 62 Clifton Rd CambridgeCB1 7EG United Kingdom Naval Research Laboratory WashingtonDC20375 United States 

出 版 物：《Optical Materials: X》 (Opt Mater X)

年 卷 期：2019年第2卷

核心收录：

基　　金：The authors are grateful to Mr Wojciech Rozwadowski for his help with the design of the temperature-controlled sample holder used for thermo-optic coefficient measurements. We thank Dr J. Meyer of the Naval Research Laboratory  United States of America  for supplying the 3.1 μm ICL and Chromacity Ltd  UK  for loaning us the 6.45 μm OPO (optical parametric oscillator) that were used for the prism measurements reported in this work 

主　　题：Refractive index 

摘      要：Chalcogenide glasses have attracted much attention for the realization of photonic components owing to their outstanding optical properties in the mid-infrared (MIR) region. However, relatively few refractive index dispersion data are presently available for these glasses at MIR wavelengths. This paper presents a mini review of methods we have both used and developed to determine the refractive indices and thermo-optic coefficients of chalcogenide glasses at MIR wavelengths, and is supported by new results. The mini review should be useful to both new and established researchers in the chalcogenide glass field and fields of MIR optics, fiber-optics and waveguides. Three groups of methods are distinguished: (1) spectroscopic ellipsometry, (2) prism-based methods, and (3) methods using Fourier transform infrared (FTIR) transmission data. The mini review is supported by a brief discussion of refractive index models. © 2019 The Author(s)