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- W99773691 abstract "Photoluminesence (PL) in undoped n-type Al x Ga 1−x As for Al mole fraction x ≤ 0.20 has been observed with below band-gap excitation from a Nd:YAG laser at 1.06 μ m. The PL band consists of two separate bands. The x-variation of the total area and peak posotion of PL bands are presented. Their temperature dependence are also measured. To account for experimental date obtained, a following mechanism has been proposed. With introducing Al atoms in n-type GaAs, a mid-gap deep complex donor can be created by the association of an incipient shallow donor with an Al atom introduced. The optical transition from this mid-gap deep donor to a resonance state sited below the L-conduction band valley could cause the PL. However, with increase of x above 0.20, the resonance state is transformed into a nonradiative center like the DX. Thus, the emissivity of mid-gap levels is controlled by substituting Al." @default.
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- W99773691 date "1990-01-01" @default.
- W99773691 modified "2023-09-26" @default.
- W99773691 title "CONTROL OF OPTICALLY PUMPED STATES OF DEEP LEVELS IN AlxGa1−xAs THROUGH SUBSTITUTION OF Al" @default.
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- W99773691 doi "https://doi.org/10.1016/b978-0-444-88429-9.50019-7" @default.
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