Anisotropic fundamental absorption edge of KTiOPO4 crystals

被引：17

作者：

Dudelzak, A ^{[1
]}

Proulx, PP

Denks, V

Mürk, V

Nagirnyi, V

机构：

[1] Canadian Space Agcy, St Hubert, PQ H3Y 8Y9, Canada

[2] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 87卷 / 05期

关键词：

D O I：

10.1063/1.372147

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The fundamental absorption edge of KTiOPO4 (KTP) crystals has been investigated with the polarization spectroscopy technique in the temperature range of 80-300 K. The Urbach rule parameters, E-0, alpha(0), sigma(0), and h omega, have been determined for the polarizations along each of the KTPs three crystallographic axes. A direct estimation of the KTP energy gap based on Urbach parameters has been made. A strong anisotropy of the gap has been found. The origin of the lowest energy electron excitations in KTP crystals and the possibility of self-trapping are discussed. (C) 2000 American Institute of Physics. [S0021-8979(00)07703-3].

引用

页码：2110 / 2113

页数：4

共 21 条

[1]

[Anonymous], 1985, POINT DEFECTS ELEMEN

[2] KTIOPO4 AND CS2WO2CL4 - 2 EXCEPTIONAL CASES OF DO ION LUMINESCENCE [J].