標題: OBSERVATION OF THE TRANSVERSE OPTICAL PHONON MODE IN CDS FILM AT 4880-A EXCITATION
作者: DAI, CM
CHUU, DS
電子物理學系
Department of Electrophysics
公開日期: 15-Mar-1992
摘要: The transverse-optical (TO) phonon mode in a CdS film with a thickness less than 410 angstrom is observed at 4880 angstrom excitation wavelength which is above the band gap of CdS bulk (2.42 eV) at room temperature. This phenomenon is ascribed to the size quantization of the free carrier in the low-dimensional thin-film structure. The quantum size effect causes a blue shift of the band gap in the as-deposited CdS thin film. The Raman shift of the TO mode of CdS film is around 220 cm-1. The softening energy of the TO phonon mode is about 8 cm-1. It was found that this softening energy is independent of the film thickness.
URI: http://dx.doi.org/10.1063/1.350995
http://hdl.handle.net/11536/3487
ISSN: 0021-8979
DOI: 10.1063/1.350995
期刊: JOURNAL OF APPLIED PHYSICS
Volume: 71
Issue: 6
起始頁: 3056
結束頁: 3058
Appears in Collections:Articles