Time-resolved second-harmonic generation was used to generate and detect coherent LO phonons in semiconductor heterojunctions. Three coherent LO/sub GaAs/, LO/sub GaAs-like/, and LO/sub AlAs-like/ phonons were launched by transiently screening the depletion field in the GaAs/Al/sub x/Ga/sub 1-x/ interfacial region.
Observation of coherent optical phonons in GaAs/Al/sub x/Ga/sub 1-x/As single heterojunctions
01.01.2003
88220 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Observation of coherent optical phonons in GaAs/AlGaAs single heterojunction
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