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题名: Verification of EL2 electronic absorption effect on charge transfer in semi-insulating GaAs
作者: Ge WK;  Song CY;  Jiang DS
发表日期: 1996
摘要: The electronic absorption of EL2 centers has been clarified to be related to the electron acid hole photoionizations, and the transition from its ground state to metastable state, respectively. Under an illumination with a selected photon energy in the near infrared region, these three processes with different optical cross sections will show different kinetics against the illumination time. It has recently been shown that the photosensitivity (measured under 1.25 eV illumination) of the local vibrational mode absorption induced by some deep defect centers in SI-GaAs is a consequence of the electron and hole photoionizations of EL2. This paper directly measures the kinetics of the electronic transition associated with EL2 under 1.25 eV illumination, which implies the expected charge transfer among different charge states of the EL2 center. A calculation based on a simple rate equation model is in good agreement with the experimental results.
刊名: PHYSICAL REVIEW B
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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Ge WK; Song CY; Jiang DS .Verification of EL2 electronic absorption effect on charge transfer in semi-insulating GaAs ,PHYSICAL REVIEW B,1996,53(15):9809-9813
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