Talk @UFF, A. Bramati (Lab. Kastler Brossel, Paris), Friday May 24th, 11.00

This week’s talk at the Infoptics group @UFF will be given by our visitor from Paris, A. Bramati (Laboratoire Kastler Brossel, UPMC-Sorbonne 
Universités). His talk’s title is “Quantum fluids of light and nano-photonics at LKB”, and it’s scheduled for next Friday, May 24th, at 11.00 in room A5-01. All are welcome! For an abstract, please see below.

Data: Sexta-Feira 24/05/2019, Sala A5-01, 11 am.

Speaker: A. Bramati (Laboratoire Kastler Brossel, UPMC-Sorbonne 
Universités)

Title: Quantum fluids of light and nano-photonics at LKB

Abstract: In this talk I will present an overview of the recent experiments performed in our group. The first part of the talk will be devoted to the so called quantum fluids of light [1], a wide family of systems where an effective photon-photon interaction can be engineered, resulting in a  hydrodynamical-like behavior. In particular I will focus on microcavity polaritons and atomic vapors. In polaritons, I will show how the development of flexible all-optical methods to inject a controlled orbital angular momentum in such systems results in the observation of
patterns of quantized vortices [2, 3]. These results open the way to the study of Abrikosov-like physics and new vortex collective phenomena. In Rubidium atomic vapors, I will present very recent experiments demonstrating the superfluid behavior in these media.

The second part of the talk will be devoted to our recent results on 
efficient room temperature single photon emitters based on core/shell colloidal semiconductor nanocrystals. By using asymmetric core/shell nanoparticles (dots-in-rods), blinking effects, multi-excitonic emission and 
polarization of the emitted photons can be simultaneously controlled by tuning the shell dimensions [4] allowing to achieve “state of the art” blinking-free sources of polarized single photons on-demand. Finally, I will discuss the different strategies we are pursuing to
develop hybrid photonic devices by coupling single nanocrystals with  various photonic structures like optical nanofibers, deep parabolic mirrors [5], liquid crystals [6] and semiconductor nanowires [7].

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