Impact of Fe3+ on UV absorption of K2Al2B2O7 crystals

被引：57

作者：

Liu, Lijuan ^{[1
]}

Liu, Chunlei ^{[1
]}

Wang, Xiaoyang ^{[1
]}

Hu, Z. G. ^{[1
]}

Li, R. K. ^{[1
]}

Chen, C. T. ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Ctr Crystal Res & Dev, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

来源：

SOLID STATE SCIENCES | 2009年 / 11卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Nonlinear optical crystal; K2Al2B2O7; Iron impurity; UV absorption; NONLINEAR-OPTICAL CRYSTAL; CHARGE-TRANSFER SPECTRA; METAL-IONS; IRON; GENERATION; GLASSES;

D O I：

10.1016/j.solidstatesciences.2009.01.003

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

K2Al2B2O7 (KABO) is a new nonlinear optical crystal capable of laser harmonic generation in the UV range. However, abnormal UV absorption prevents its application in effectively generating UV light with wavelength shorter than 300 nm. The transmittance spectra of the grown crystals show distinct absorption bands at 216 nm and 264 nm. It is observed that the UV absorption is Strongly Correlated with iron impurity at a parts per million (ppm) level. Furthermore, electron paramagnetic resonance (EPR) spectra of the absorbing crystals show a strong signal at g = 2.00 position corresponding to a Fe3+ center. A new crystal growth method which reduces the iron content has been proposed and results show that the new KABO crystal is free from the Fe3+ UV absorptions. (C) 2009 Elsevier Masson SAS. All rights reserved.

引用

页码：841 / 844

页数：4

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