The Infrared Absorption of GaP Single Crystals with Silicon and Oxygen Impurities
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概要
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Infrared transmission measurements of GaP with Si and O donor impurities at liquid helium and room temperatures reveal absorption lines due to excitation of the donor electrons and excitations of localized phonons. Observed spectra for Si donor are used to determine the optical ionization energy of 82.5±0.05 meV for 81 donors substituting for the Ga site in the GaP crystal. A fitting of Kasami's effective-mass calculation for donor states to the observed silicon donor levels yields the effective masses of the conduction band: m_&⊥=(0.198±0.002)m_0 and m_&⫽=(1.65±0.02)m_0. The absorption line at 464 cm^<-1> is due to the excitation of localized oxygen phonons substituting for the P site, and the absorption line at 495 cm^<-1> is due to the excitation of localized silicon phonons substituting for the Ga site, taking account of Lifshitz's theory of lattice vibrations around an impurity of different mass.
- 社団法人応用物理学会の論文
- 1972-02-05
著者
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Kudo Keiei
Institte For Optical Research Kyoiku University
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Arai Toshihiro
Institute For Optical Research Kyoiku University
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Umemoto Shinya
Faculty Of Engineering Tokai University
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ASANUMA Nobuhisa
Institute for Optical Research, Kyoiku University
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Arai Toshihiro
Institte For Optical Research Kyoiku University
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Asanuma Nobuhisa
Institute For Optical Research Kyoiku University:(present) Toyo Communication Equipment Co. Ltd.
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