Exciton spectra of ZnO epitaxial layers on lattice-matched substrates grown with laser-molecular-beam epitaxy

被引：198

作者：

Makino, T ^{[1
]}

Chia, CH

Tuan, NT

Segawa, Y

Kawasaki, M

Ohtomo, A

Tamura, K

Koinuma, H

机构：

[1] Inst Phys & Chem Res, Photodynam Res Ctr, Sendai, Miyagi 9800868, Japan

[2] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Yokohama, Kanagawa 2268502, Japan

[3] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[4] Tohoku Univ, Dept Phys, Sendai, Miyagi 980, Japan

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 24期

关键词：

D O I：

10.1063/1.126703

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical properties in undoped-ZnO epilayers grown by the laser-molecular-beam epitaxy method on lattice-matched ScAlMgO4 substrates were investigated. The absorption spectrum at 5 K has two sharp peaks, both of which are attributed to resonances of A and B excitons, which reflect a small nonradiative damping constant of excitons as well as high film crystallinity accomplished by the virtue of lattice matching. The coupling strengths of exciton-acoustic phonon and of exciton-longitudinal-optical phonon were directly determined from the temperature dependence of exciton absorption spectra independently for A and B excitons, which are close in energy and obey the same selection rule for each other. (C) 2000 American Institute of Physics. [S0003-6951(00)02924-7].

引用

页码：3549 / 3551

页数：3

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