Radiatively limited dephasing of quantum dot excitons in the telecommunications wavelength range

J. Ishi-Hayase, K. Akahane, N. Yamamoto, M. Sasaki, M. Kujiraoka, K. Ema

研究成果: Article査読

22 被引用数 (Scopus)

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
論文番号103111
ジャーナルApplied Physics Letters
91
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)

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