"Dipersion of Fermi edge polaritons in modulation-doped quantum wells embedded in a microcavity"

TYPESpecial 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
Location:Solid State Auditorium(Entrance)

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.