Collective dynamics of excitons and polaritons in semiconductor nanostructures
arXiv:0912.1937 · doi:10.1088/0268-1242/25/4/043001
Abstract
Time resolved photoluminescence is a powerful technique to study the collective dynamics of excitons and polaritons in semiconductor nanostructures. We present a two excitation pulses technique to induce the ultrafast and controlled quenching of the exciton emission in a quantum well. The depth of the dip is given by the magnitude of the warming of the carriers induced by the arrival of a laser pulse when an exciton population is already present in the sample. We use this technique to study the relaxation mechanisms of polaritons in semiconductor microcavities, which are of great importance to enhance the conditions for their condensation under non-resonant excitation. We also explore the dynamics of polariton fluids resonantly created in the lower polariton branch in a triggered optical parametric oscillator configuration, showing evidence of polariton superfluidity, and opening up the way to the real-time study of quantum fluids.
38 pages, 18 figures, accepted in Semicond. Sci. Technol. (PhD tutorial)
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Cited by in corpus (9)
- Fully tunable exciton-polaritons emerging from WS monolayer excitons in an optical lattice at room temperature
- Operation speed of polariton condensate switches gated by excitons
- Experimental realization of a polariton beam amplifier
- Oblique solitons in the flow of polariton condensate past an obstacle
- Amplitude-mode dynamics of polariton condensates
- Quasi-one-dimensional flow of polariton condensate past an obstacle
- Vortices in polariton OPO superfluids
- Nonlinear emission dynamics of a GaAs microcavity with embedded quantum wells
- Long-lived non-thermal states in pumped one-dimensional systems of hard-core bosons