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Author Amo, A. ♦ Sanvitto, D. ♦ Vina, L.
Source arXiv.org
Content type Text
Educational Degree Doctor of Philosophy (Ph.D.)
File Format PDF
Date of Submission 2009-12-10
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Condensed Matter - Mesoscale and Nanoscale Physics ♦ Condensed Matter - Quantum Gases ♦ physics:cond-mat
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.
Description Comment: 38 pages, 18 figures, accepted in Semicond. Sci. Technol. (PhD tutorial)
Reference: Semicond. Sci. Technol. 25, 043001 (2010)
Educational Use Research
Learning Resource Type Article
Page Count 38


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