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.


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    Title :

    Observation of coherent optical phonons in GaAs/Al/sub x/Ga/sub 1-x/As single heterojunctions


    Contributors:
    Chang, Y.-M. (author) / Chang, N.-A. (author) / Chang, Y.-H. (author)


    Publication date :

    2003-01-01


    Size :

    88220 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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