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SUMMARY:CM Seminar: Carlos Silva-Acuña – Université de Montréall: Many-Body Exciton Polariton Quantum Dynamics in Optical Microcavities based on two-dimensional Metal-Halide Semiconductors
DESCRIPTION:CM Seminar: Carlos Silva-Acuña – Institut Courtois & Département de physique\, Université de Montréal \nTitle: Many-Body Exciton Polariton Quantum Dynamics in Optical Microcavities based on two-dimensional Metal-Halide Semiconductors \nAbstract: Two-dimensional analogs of metal-halide perovskites represent a promising platform for exciton-polariton-based technologies. They sustain strongly bound excitons that are stable at room temperature\, readily enabling strong light-matter coupling at ambient conditions. In the strong coupling limit\, uncoupled excitons have been mainly regarded as a reservoir for the polariton population. In this work\, we posit that there is a bidirectional interplay between the uncoupled exciton dynamics and the polariton quantum dynamics. We fabricated a Fabry-Pérot microcavity\, enclosing a two-dimensional hybrid organic-inorganic lead-iodide semiconductor\, and resolved the multi-particle correlations of exciton-polaritons — that is their population and coherence dynamics — employing excitation correlation photoluminescence and two-dimensional coherent excitation spectroscopies. We find (i) an increased exciton bimolecular scattering rate of the exciton reservoir in the microcavity relative to the bare semiconductor; (ii) ultrafast population transfer from the uncoupled exciton states and the middle polariton to the lower polariton; and (iii) two-quantum correlations between polaritons and uncoupled excitons. Our work quantifies many-body correlations between bare excitons and exciton-polaritons\, which are fundamental in mechanisms of the formation of polariton condensates. \nSpeaker Bio: Carlos Silva-Acuña is the Director of the Courtois Institute and a Professor at the Department of Physics at Université de Montréal. \n  \n 
URL:https://qmi.ubc.ca/event/cm-seminar-carlos-silva-acuna-universite-de-montreal-many-body-exciton-polariton-quantum-dynamics-in-optical-microcavities-based-on-two-dimensional-metal-halide-semiconductors/
LOCATION:BRIM 311\, 2355 East Mall\, Vancouver\, British Columbia\, V6T 1Z4\, Canada
CATEGORIES:CM Seminar
ORGANIZER;CN="Aditi Adhikari":MAILTO:aditi.adhikari@ubc.ca
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