Two‐photon spectroscopy of GaAs
作者:
D. G. Seiler,
C. L. Littler,
D. Heiman,
期刊:
Journal of Applied Physics
(AIP Available online 1985)
卷期:
Volume 57,
issue 6
页码: 2191-2195
ISSN:0021-8979
年代: 1985
DOI:10.1063/1.334361
出版商: AIP
数据来源: AIP
摘要:
Two‐photon absorption spectra of GaAs were obtained using photoconductivity techniques. At zero magnetic field, the spectrum has a photon energy (ℏ&ohgr;) dependence of (2ℏ&ohgr;–Eg)3/2just above the energy band gap (Eg), and can be described without considering exciton enhancement effects. Oscillatory behavior in the photoconductive response at zero field as a function of incident two‐photon energy has been observed and shown to be due to the interaction of the photoexcited electrons and longitudinal optical phonons. At high magnetic fields, the spectra are quantitatively interpreted in terms of a modified Pidgeon–Brown energy band model.
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