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Non-linear luminescence due to exciton - e-h plasma transformation in mixed type I - type II quantum wells |
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| Institution: | 1. Structural Technologies Division, CSIR-National Aerospace Laboratories, Bangalore 560017, India;2. Department of Aerospace Engineering, Indian Institute of Technology – Madras, Chennai 600036, India;1. INFN - Sezione di Milano, via Celoria 16, 20133 Milano, Italy;2. INFN - Laboratori Nazionali di Frascati, Via Enrico Fermi 40, 00044 Frascati, Italy;3. Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy |
| Abstract: | We report on the photoluminescence and its excitation spectra of mixed type I - type II GaAs/AlAs quantum wells (MTQW) under applied magnetic fields. These structures consist of alternating narrow and wide wells and are designed so that the electron density in the wide well can be optically controlled. A transition from excitonic to free carrier recombination is observed as the electron density is increased. |
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