Photoreflectance spectra of a ZnO heteroepitaxial film on the nearly lattice-matched ScAlMgO4 (0001) substrate grown by laser molecular-beam epitaxy

S. F. Chichibu, A. Tsukazaki, M. Kawasaki, K. Tamura, Y. Segawa, T. Sota, H. Koinuma

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

Photoreflectance spectra of a high-quality ZnO epilayer on the ScAlMgO 4 (0001) substrate grown by laser molecular-beam epitaxy exhibited clear excitonic resonances due to three excitons associated with uppermost valence bands (A, B, and C excitons). The oscillator strengths of the B and C excitons are larger than that of the A exciton. Their broadening was interpreted to be due to the contribution by exciton-polaritons in terms of large longitudinal-transverse splitting of respective excitons. Dependence of the exciton energy on temperature was well fitted assuming the Bose-Einstein statistics giving the Einstein characteristic temperature E of 380 K (33 meV).

Original languageEnglish
Pages (from-to)2860-2862
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number16
DOIs
Publication statusPublished - 2002 Apr 22
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Photoreflectance spectra of a ZnO heteroepitaxial film on the nearly lattice-matched ScAlMgO<sub>4</sub> (0001) substrate grown by laser molecular-beam epitaxy'. Together they form a unique fingerprint.

Cite this