Valence-band-ordering of a strain-free bulk ZnO single crystal identified by four-wave-mixing spectroscopy technique

K. Hazu, S. F. Chichibu, S. Adachi, T. Sota

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Spectroscopic and temporal four-wave-mixing (FWM) measurements are carried out on a strain-free bulk ZnO single crystal, in order to clarify the valence-band-ordering. Under the collinearly polarized lights with the electric-field component parallel to the c-axis, which can excite dipole-allowed Γ 1-excitons, the FWM signal appears only in the energies corresponding to the B-exciton. Under the cross-linear polarization configuration exciting both Γ 5- and Γ 1-excitons, the FWM signal arising from the two-photon-coherence is absent in the energies corresponding to A-exciton. Both the results indicate that Γ 1-exciton state belongs exclusively to B-exciton, meaning that the valence-band ordering is Γ 9 - Γ 7 - Γ 7 in order of decreasing electron energy for the present strain-free ZnO single crystal.

本文言語English
論文番号093522
ジャーナルJournal of Applied Physics
111
9
DOI
出版ステータスPublished - 2012 5 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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