Far-infrared „l588 mm... electroluminescence in a quantum cascade structure
نویسندگان
چکیده
Intersubband electroluminescence has been investigated in a quantum cascade structure based on vertical transition designed for far-infrared (l588 mm) emission. A narrow luminescence peak with a full width at half maximum of 0.7 meV is measured at low excitation currents ~30 A/cm! and low temperature (T55 K). The electroluminescence efficiency exhibits a strong temperature and current dependence, consistent with an interplay between electron–electron and optical phonon scattering. © 1998 American Institute of Physics. @S0003-6951~98!01751-3#
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