ZnO lasing in complex systems with tetrapods

被引：22

作者：

Markushev, V. M. ^{[1
]}

Ursaki, V. V. ^{[2
]}

Ryzhkov, M. V. ^{[1
]}

Briskina, C. M. ^{[1
]}

Tiginyanu, I. M. ^{[2
]}

Rusu, E. V. ^{[2
]}

Zakhidov, A. A. ^{[3
]}

机构：

[1] RAS, Inst Radio Engn & Elect, Moscow 125009, Russia

[2] Moldavian Acad Sci, Lab Low Dimens Semicond Struct, Inst Appl Phys, Kishinev 2028, Moldova

[3] Univ Texas Dallas, NanoTech Inst, Richardson, TX 75083 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2008年 / 93卷 / 01期

关键词：

D O I：

10.1007/s00340-008-3153-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A ZnO structure in the form of a core-shell wire was grown with a modified vapour transport and condensation method. The wire consists of a dense core which may play the role of a waveguide and a shell formed mainly from tetrapod-type crystallites. The high optical quality of the produced ZnO material is confirmed by continuous wave photoluminescence (PL) analysis demonstrating that low-temperature PL is related to the recombination of bound excitons, while room-temperature PL is due to free excitons. Good quality of the crystal structure is demonstrated also by the Raman spectrum. The shell of the wire exhibits room-temperature laser action due to lasing modes in tetrapods under the excitation by nanosecond laser pulses. The nature of the lasing modes is discussed. A simplified model for one of the possible modes is suggested.

引用

页码：231 / 238

页数：8

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