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DTSTART:20190408T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/867563-optical-device
 s-based-on-exciton-polariton-quantum-fluids-dario-ballarini-cnr-nanotec-it
 aly
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Optical devices based on exciton-polariton quantum fluids - Dario B
 allarini (CNR-NANOTEC\, Italy)
DESCRIPTION:ATTENTION: salle inhabituelle: D-460 Roger-Gaudry
Optical devic
 es based on exciton-polariton quantum fluidsDario BallariniCNR-NANOTEC
Abs
 tract: Exciton-polaritons are composite bosons arising from the interactio
 n of light and matter in semiconductors materials. The photonic component 
 provides the excitons with a light mass and robustness against dephasing\,
  while the material component dresses the photons with sizeable interactio
 ns. Above a critical density\, exciton-polaritons undergo a phase transiti
 on to a macroscopically degenerate quantum state akin to Bose Einstein con
 densates which survives up to room temperature and in a disordered environ
 ment. Such properties make exciton-polaritons an interesting platform for 
 studying many-body physics in solid state heterostructures and a promising
  candidate for the realization of efficient optical devices. In this talk 
 we’ll see how an exciton-polariton condensate in high-quality semiconduc
 tor microcavities can be optically manipulated by externally imposing the 
 phase and density landscape. The excitations of the condensate\, the effec
 t of the exciton reservoir and the control over the formation of topologic
 al structures are measured and described in terms of particle-particle int
 eractions and energy relaxation toward the ground state. Moreover\, the li
 mit of a single polariton propagating within the plane of the microcavity 
 is discussed in terms of the requirements for the realization of nonlinear
  gates for quantum information processing. Finally\, different strategies 
 to achieve room temperature propagation and interactions are reviewed\, in
 cluding the implementations of alternative photonic structures and the str
 ong coupling with low-dimensional\, hybrid organic-inorganic materials.
Fo
 r more information about the research group\, follow this link.
Cette conf
 érence est présentée par le RQMP Versant Nord du Département de phy
 sique de l'Université de Montréal et de Génie physique de la Polytec
 hnique.
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