Ultraviolet optical properties of CaSrF2 crystal grown by the cone die Czochralski method

被引：0

作者：

Akabe, Yugo ^{[1
]}

Enomoto, Kotaro ^{[1
]}

Shinohara, Keito ^{[1
]}

Raduban, Marilou ^{[2
]}

Shimizu, Toshihiko ^{[1
]}

Sarukura, Nobuhiko ^{[1
]}

Okumura, Rui ^{[1
]}

Kodama, Ryosuke ^{[1
]}

Takahashi, Kazuya ^{[3
]}

Kawamata, Toru ^{[4
]}

Sugiyama, Kazumasa ^{[4
]}

Fukuda, Tsuguo ^{[3
]}

机构：

[1] Osaka Univ, Inst Laser Engn, 2-6 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Unitec Inst Technol, 139 Carrington Rd, Mt Albert 1025, Auckland, New Zealand

[3] Fukuda Crystal Lab Co Ltd, 6-6-3 Minami Yoshinari Aoba Ku, Sendai 9893204, Japan

[4] Tohoku Univ, Inst Mat Res, 2-1-1 Katahira Aoba Ku, Sendai 9808577, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2025年 / 649卷

关键词：

REFRACTIVE-INDEX;

D O I：

10.1016/j.jcrysgro.2024.127949

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Fluoride crystals with extremely wide band gaps are ideal optical materials in the UV wavelength range. Large 4inch diameter calcium strontium fluoride (Ca0.582Sr0.418F2) single crystal was grown using the Czochralski method with a Cone-shape Die (CD-CZ). The refractive index and relative transmittance of the crystal was evaluated by cutting it into a triangular prism and polished. The direct measurement of the refractive index and relative transmittance was done by using a spectrograph to image the refraction of light as it passes through a dual prism set-up consisting of a SQ prism as reference and either CaF2 or Ca0.582Sr0.418F2 as the material under evaluation. Characterization results showed that Ca0.582Sr0.418F2 has excellent refractive index dispersion and transmittance in the UV region, confirming the applicability of the dual prism with spectrograph setup to measurements of the refractive index and relative transmittance in the UV region.

引用

页数：5

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