Intersubband transitions in In0.52Ga0.48As/In0.52Al0.48As multiple quantum wells grown on lattice matched 10 substrates were investigated using Fourier transform infrared (FTIR) absorption and photoluminescence (FTPL) techniques. The well width was tailored to produce excited states resonant in the conduction band, at the edge of the conduction band, and confined in the quantum wells, Interband transitions were also probed using FTPL and optical absorption techniques. The FTPL spectra show that three interband transitions exist in the quantum well structures with well width larger than 30 Angstrom. The intersubband transitions in this class of quantum wells seem to withstand proton irradiation with doses higher than those used to deplete the intersubband transitions in the GaAs/AlGaAs multiple quantum wells.
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Chinese Acad Sci, Shanghai Inst Met, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R ChinaChinese Acad Sci, Shanghai Inst Met, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China
Yang, QK
Chen, JX
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Chinese Acad Sci, Shanghai Inst Met, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R ChinaChinese Acad Sci, Shanghai Inst Met, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China
Chen, JX
Li, AZ
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Chinese Acad Sci, Shanghai Inst Met, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R ChinaChinese Acad Sci, Shanghai Inst Met, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China