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首页> 美国卫生研究院文献>Scientific Reports >Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses
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Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses

机译：揭示硫族化物玻璃的化学成分与折射率色散之间的相互关系

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摘要

A facile procedure for compositional screening of chalcogenide glass (CG) is proposed to manage its infrared transmission edge (ωc) as well as refractive index dispersion (ν) in the long-wavelength infrared (LWIR) range. Both ωc and ν of CG turn out to be interpretable simply in connection with its chemical composition based on a postulation that CG behaves as a single average harmonic oscillator (SAHO). In this SAHO model, ωc is expressed as a function of molar mass and average bond energy, both of which are easily accessible for a given CG composition. Two prototypical CG-forming systems in Ge-Sb-Se and Ge-Sb-S compositions exemplify the empirical compositional dependence of ωc, which further plays a decisive role in determining ν. Following the present approach, a set of highly dispersive CG compositions in the Ge-Sb-S system is newly unveiled together with low-dispersion Ge-Sb-Se glasses. It is then experimentally demonstrated that a doublet lens configuration consisting of convex and concave lenses with low and high ν values, respectively, is able to reduce the optical aberrations. This finding presents an opportunity that ν can be envisaged just based on the compositional ratio of CG, thus facilitating completion of the LWIR Abbe diagram.
机译：提出了一种简便的进行硫族化物玻璃（CG）成分筛选的方法，以控制其红外透射边缘（ωc）和长波长红外（LWIR）范围内的折射率色散（ν）。事实证明，CG的ωc和ν可以简单地根据其化学成分来解释，这是基于CG表现为单个平均谐波振荡器（SAHO）的假设。在此SAHO模型中，ωc表示为摩尔质量和平均键能的函数，对于给定的CG组成，这两者都很容易获得。 Ge-Sb-Se和Ge-Sb-S成分中的两个原型CG形成系统例证了ωc的经验成分依赖性，这在确定ν中起着决定性的作用。遵循本发明的方法，Ge-Sb-S系统中的一组高分散性CG成分与低分散性Ge-Sb-Se玻璃一起被首次亮相。然后，通过实验证明，由分别具有低和高ν值的凸透镜和凹透镜组成的双合透镜配置能够降低光学像差。该发现提供了仅基于CG的组成比就可以设想ν的机会，从而有助于完成LWIR阿贝图。

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