We present new classes of E-O modulators and frequency converters based on L-valley intersubband transitions in GaSb-based QW systems. Effective-mass anisotropy and the tilt of the growth direction with respect to the principal axes of the ellipsoidal constant-energy surfaces of L valleys enable these novel devices to operate at normal incidence. An additional advantage of the GaSb-based QW system is that the large conduction-band offset of the GaSb/AlSb system (up to 1 eV) allows operation over a wide infrared range covering longwave (8-12 /spl mu/m), midwave (3-5 /spl mu/m), and even shorter wavelengths.


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    Title :

    Intersubband electro-optics and frequency conversion at normal incidence


    Contributors:
    Xie, H. (author) / Wang, W.I. (author) / Meyer, J.R. (author) / Hoffman, C.A. (author)

    Published in:

    Proceedings of LEOS'94 ; 1 ; 23-24 vol.1


    Publication date :

    1994-01-01


    Size :

    123118 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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