Photoinduced change in exciton luminescence spectra of CuCl nanocrystals embedded in a polymer matrix

Luo Xian Zhang, Kazuyoshi Yamanaka, Keiichi Edamatsu, Tadashi Itoh, Yoshiyuki Ono, Katsuhiro Sato

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


Exciton absorption and luminescence spectra have been measured at 77 K for CuCl nanocrystals embedded inside a matrix of polyimide. Extraordinary photo-induced change of the luminescence spectra is found under the continuous irradiation of UV laser light. Within a few minutes of laser irradiation at 800 W/cm2, the peak intensity of the exciton luminescence considerably decreases, and instead, another peak appears on higher energy side and its intensity increases up to more than that of the initial peak. Exciton luminescence yield for the sample affected by the photoinduced change is found to be improved by about three times. Origin of the photoinduced change is discussed in relation to the quantum-size effect on the confined excitons.

Original languageEnglish
Pages (from-to)341-344
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics
Issue number2-4
Publication statusPublished - 1997 Dec 1
EventProceedings of the 1997 International Symposium on Quantum Structures for Photonic Applications, QSPA'97 - Sendai, Jpn
Duration: 1997 Mar 61997 Mar 8

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Condensed Matter Physics


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