抄録
The extremely long dephasing time of excitons in strain-compensated quantum dots at telecommunications wavelengths was measured using a polarization-dependent four-wave mixing technique. The use of a 150-layer-stacked structure enabled them to measure a four-wave mixing signal with a high signal-to-noise ratio, in spite of the fact that a high-sensitive heterodyne detection was not used. The large anisotropy of the dephasing time indicates the dominance of the radiative recombination process on dephasing. By simultaneously measuring the radiative lifetime using a pump-probe technique, they could directly estimate pure dephasing with an accuracy of better than 0.1 μeV.
本文言語 | English |
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論文番号 | 103111 |
ジャーナル | Applied Physics Letters |
巻 | 91 |
号 | 10 |
DOI | |
出版ステータス | Published - 2007 |
外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学(その他)