"Dipersion of Fermi edge polaritons in modulation-doped quantum wells embedded in a microcavity" |
| TYPE | Special Seminar - Solid State Institute, Technion |
| Speaker: | Mr. Ori Scaly (M.Sc.Student of Prof. Elisha Cohen) |
| Affiliation: | Department of Physics and Solid State Institute, Technion |
| Date: | 31.10.2010 |
| Time: | 08:30 |
| Location: | Solid State Auditorium(Entrance) |
| Abstract: | Polaritons are composite excitations that arise from the resonant interaction between light and interband transitions (excitons) in a quantum well (QW) embedded in a microcavity. When a two-dimensional electron gas is present in the QW, the polaritons arise from vertical transitions at the Fermi edge. I studied the in-plane dispersion of Fermi edge polaritons in various GaAs/AlGaAs modulation-doped QW's, having an electron gas in the range 0 < ne < 2x1011 cm-2, by measuring the angular dependent photoluminescence spectrum. The polariton dispersion curves are well described by the coupled-oscillators model. |