Abstract
The linear polarization behavior of electron-heavy hole excitonic recombination is studied on two types of single square quantum wells (SSQW). The SSQW structures with the special feature that the heavy hole to light hole separation is near an optical phonon frequency of the structure (called "double resonance" type) show a strong linear polarization dependence on the incident energy. The "ordinary" type SSQW (i.e. not of the double resonance type) show little or no linear polarization. The double resonance samples also show reduction of the photoluminescence linewidth when the incident energy is near the light hole to electron energy separation. These observations indicate a strong modification of the confined heavy hole level due to the mixing between the heavy hole and light hole plus an optical phonon mode.
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