Abstract
We report the control of spontaneous emission wavelength of quantum wells (QWs) using an artificial design of semiconductor lattice, i.e., quantum structure lattice (QSL). Two-dimension square quantum box arrays fabricated in strained InGaAs/GaAs QW samples are used as active lattice units in QSL for this study. The photoluminescence peak wavelength of the QSL can be adjusted to blue-shift, red-shift, or unchanged from that of the as-grown QW by fitting the in-plane Bragg diffraction condition of the QSL. The wavelength-shift has values of multiple phonon energies indicating that the phonon-assisted recombination process may play a significant role in the observed spontaneous emission.
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