Tuning the optical isotropic point of mixed crystals of ethylenediammonium sulfate/selenate.
Tuning the optical isotropic point of mixed crystals of ethylenediammonium sulfate/selenate.
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DOI：
10.1107/s1600576719015863
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发表时间：
2020-02
影响因子：
6.1
通讯作者：
Melissa Tan;Alexander T Martin;A. Shtukenberg;B. Kahr
中科院分区：
文献类型：
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作者：
Melissa Tan;Alexander T Martin;A. Shtukenberg;B. Kahr
在各向异性晶体中，光学各向同性点是线性双折射消失的波长，因为两个本征模的折射率偶然相等。在这里，光学各向同性点的亚乙基二铵硒酸盐（EDSe）的调谐通过生成一系列的固体溶液的EDSe掺杂硫酸盐。Mueller矩阵偏振法和单晶X-射线衍射用于关联EDS x Se 1-x的晶体组成的线性双折射的变化。本文提出了一种利用各向同性点混晶作为可调谐双折射光学带通滤波器的方案，并对其性能进行了模拟。
In anisotropic crystals, optical isotropic points are wavelengths where linear birefringence disappears because the refractive indices for both eigenmodes are accidentally equivalent. Here, the optical isotropic point of ethylene-diammonium selenate (EDSe) is tuned by generating a solid-solution series of EDSe doped with sulfate. Mueller matrix polarimetry and single-crystal X-ray diffraction are used to correlate changes in linear birefringence with the crystal composition of EDS x Se1-x . A scheme for using mixed crystals with isotropic points as tunable birefringent optical bandpass filters is proposed and their performance is modeled.