Photoinduced infrared absorption spectra of CuCl quantum dots in NaCl

K. Yamanaka, K. Edamatsu, T. Itoh

研究成果: Article査読

抄録

We have studied infrared transient absorption spectra of CuCl QDs grown inside a NaCl matrix under tunable UV laser excitation on resonance with the confined excitons. In addition to the transient excited-state absorption, there appears induced IR absorption with lifetime much longer than that of the confined exciton. The peak energy remains at ∼0.3 eV regardless of the QD size. The optical density is proportional to the square root of the UV laser power. The decay of the induced absorption is logarithmic on time and is accelerated by the irradiation of light below the band gap. We assign this absorption to be originated from the electron-bound defect center called Ie center generated in the NaCl side of the interface and discuss it phenomenon in relation with photo-irradiation effects, such as photofatigue, blinking of the luminescence and hole burning.

本文言語English
ページ(範囲)4005-4008
ページ数4
ジャーナルInternational Journal of Modern Physics B
15
28-30
DOI
出版ステータスPublished - 2001 12 10
外部発表はい

ASJC Scopus subject areas

  • 統計物理学および非線形物理学
  • 凝縮系物理学

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