Selenium molecules and their possible role in deep emission from glasses doped with selenide nanocrystals

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.362840· OSTI ID:285546

Su, Z; Rodrigues, P A; Yu, P Y ^[1]; Risbud, S H ^[2]

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1. Department of Physics, University of California at Berkeley
2. Division of Materials Science and Engineering, Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616 (United States)

We report the observation of Raman scattering from a vibration mode with frequency of 320 cm{sup {minus}1} and its higher-order harmonics in silicate glasses doped with selenide semiconductor nanocrystals such as CdSe and ZnSe. Comparison with Raman spectra of glasses and alkali halides doped with Se suggests that these modes are caused by the presence of selenium molecules in the glasses. When excited in the blue and green by an Ar{sup +} laser, glasses containing Se only are found to emit strong near-infrared luminescence whose peak and line shape are very similar to the so-called {open_quote}{open_quote}deep emission{close_quote}{close_quote} observed frequently from selenide-doped glasses. Possible effects of Se molecules on the linear and nonlinear optical properties of glasses containing selenide nanocrystals are discussed. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 285546
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 2 Vol. 80; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM SELENIDES
DOPED MATERIALS
GLASS
INFRARED SPECTRA
LINE SHAPE
NANOSTRUCTURES
PHOTOLUMINESCENCE
SILICATES
VIBRATIONAL STATES
ZINC SELENIDES