抄録
We have studied experimentally biexcitonic states of ZnO of rather high quality in the low exciton density limit by means of time-integrated and spectrally-resolved four-wave mixing (FWM). FWM emission signals due to biexcitons consisting of two A-hole excitons (AA biexcitons), an A-hole and a B-hole exciton (AB biexcitons), and two B-hole excitons (BB biexcitons) have been clearly observed according to polarization selection rules. The obtained binding energies for AA, AB, and BB biexcitons are 15.6, 16.6, and 4.7 meV, respectively. A brief discussion is also given on the contribution of biexciton and two-pair continuum resonances to the FWM signal.
本文言語 | English |
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論文番号 | 033205 |
ページ(範囲) | 332051-332054 |
ページ数 | 4 |
ジャーナル | Physical Review B - Condensed Matter and Materials Physics |
巻 | 68 |
号 | 3 |
出版ステータス | Published - 2003 7 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics