Size effects on photoacoustic spectra for GaAs fine powder

被引:3
作者
Kawahara, T
Kimura, A
Ninomiya, M
Sato, Y
Okamoto, Y
Morimoto, J
Miyakawa, T
Okumura, T
机构
[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan
[2] Chiba Inst Technol, Dept Comp Sci, Narashino, Chiba 2750016, Japan
[3] Tokyo Metropolitan Univ, Dept Elect Engn, Hachioji, Tokyo 1920397, Japan
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2002年 / 41卷 / 5B期
关键词
PAS; photoacoustic spectroscopy; GaAs; low dimensional materials; fine powder samples;
D O I
10.1143/JJAP.41.3363
中图分类号
O59 [应用物理学];
学科分类号
摘要
The photoacoustic (PA) spectra of GaAs fine powder whose particle size was of the micrometer order were measured. The PA spectra show a broad peak and this peak shifts to the high-energy region as the sample particle size decreases. The band gap shift can be observed for the large-particle-size samples in the PA spectra. On the other hand, the PA peak shift for the small-particle samples is caused by the light penetration effect causing the decrease of the PA signals, where the particle size is smaller than the light absorption length. Although careful elucidation of the band gap shift in the fine powder samples from the PA measurement is required, the light absorption spectra above the band gap energy can be estimated.
引用
收藏
页码:3363 / 3366
页数:4
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