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Valence-band-ordering of a strain-free bulk ZnO single crystal identified by four-wave-mixing spectroscopy technique
| Title: | Valence-band-ordering of a strain-free bulk ZnO single crystal identified by four-wave-mixing spectroscopy technique |
| Authors: | Hazu, K. Browse this author | | Chichibu, S. F. Browse this author | | Adachi, S. Browse this author →KAKEN DB | | Sota, T. Browse this author |
| Keywords: | excitons | | III-VI semiconductors | | multiwave mixing | | valence bands | | wide band gap semiconductors | | zinc compounds |
| Issue Date: | 1-May-2012 |
| Publisher: | American Institute of Physics |
| Journal Title: | Journal of Applied Physics |
| Volume: | 111 |
| Issue: | 9 |
| Start Page: | 093522 |
| Publisher DOI: | 10.1063/1.4711103 |
| Abstract: | 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 Γ1-excitons, the FWM signal appears only in the energies corresponding to the B-exciton. Under the cross-linear polarization configuration exciting both Γ5- and Γ1-excitons, the FWM signal arising from the two-photon-coherence is absent in the energies corresponding to A-exciton. Both the results indicate that Γ1-exciton state belongs exclusively to B-exciton, meaning that the valence-band ordering is Γ9 - Γ7 - Γ7 in order of decreasing electron energy for the present strain-free ZnO single crystal. |
| Rights: | Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 111, 093522 (2012) and may be found at https://dx.doi.org/10.1063/1.4711103 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/49402 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 足立 智
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