Absorption anisotropy in sulfur doped gallium selenide crystals studied by THz-TDS

被引：25

作者：

Molloy, John F. ^{[1
]}

Naftaly, Mira ^{[1
]}

Andreev, Yury ^{[2
,3
]}

Kokh, Konstantin ^{[3
,4
,5
]}

Lanskii, Gregory ^{[2
,3
]}

Svetlichnyi, Valery ^{[3
]}

机构：

[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[2] Russian Acad Sci, Siberian Branch, Inst Monitoring Climat & Ecol Syst, Tomsk 634055, Russia

[3] Tomsk State Univ, Siberian Phys Tech Inst, Tomsk 634050, Russia

[4] Russian Acad Sci, Siberian Branch, Inst Geol & Mineral, Novosibirsk 630090, Russia

[5] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

OPTICAL MATERIALS EXPRESS | 2014年 / 4卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

TIME-DOMAIN SPECTROSCOPY; OPTICAL-ABSORPTION; TERAHERTZ; GASE; GENERATION; PHASE; CONSTANTS; RADIATION; RANGES; SYSTEM;

D O I：

10.1364/OME.4.002451

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Top optical quality nonlinear gallium selenide crystals doped with different sulfur concentrations (1.1, 2.5, 5, 7, 11 mass%) are grown by modified Bridgman method. Physical origins of inaccuracy in the measurement of THz o- and e-wave absorption spectra by THz-TDS are identified. Dominant absorption for o-wave is established for all crystal compositions. Frequency independent absorption within 0.3-2 THz is demonstrated. Phonon mode transformation is studied in detail. Phonon absorption peak for e-wave centered at 1.1 THz is recorded for the first time. It is shown that e-wave THz generation is preferable in GaSe:S (2.5-5 mass%) crystal. (C)2014 Optical Society of America

引用

页码：2451 / 2459

页数：9

共 53 条

[1] Lattice vibrations of pure and doped GaSe [J].