CONGRESOS, CURSOS Y CONFERENCIAS
Seminario INMA – Impulso: Two-dimensional materials for nonlinear and quantum photonics - Carlos Antón-Solanas
El próximo miércoles 15 de febrero tendrá lugar una nueva sesión del ciclo de conferencias INMA-Impulso, un ciclo de conferencias que trata de acercar la investigación más puntera a la sociedad.
La próxima sesión titulada: “Two-dimensional materials for nonlinear and quantum photonics” correrá a cargo de Carlos Antón-Solanas de la Universidad Autónoma de Madrid.
Resumen de la charla:
Atomically thin crystals of transition metal dichalcogenides (TMDCs) have emerged as a new platform to study tightly bound excitons and many-body excitations. Their giant dipole coupling to light makes them prime materials for nanophotonic and electronic devices, and for fundamental research on cavity quantum electrodynamics. TMDC excitons can emit at room temperature, and they offer unique, tailorable interactions based on van-der-Waals stacking of monolayers.
In the first part of this talk, I will discuss the formation of exciton-polaritons based on TMDC excitons. Different cavities and two-dimensional materials are explored in various experimental conditions (cold and room temperature) to reach strong coupling between excitons and confined photons. Exciton-polaritons are solid-state quasiparticles with properties linked to matter (Coulomb interactions, magnetic response) and light (extended spatial and temporal coherence). The bosonic character of exciton-polaritons enables their capability to condense into a macroscopic coherent state, like the laser emission, with additional features such as controllable nonlinear interactions.
In the second part, I will discuss another platform to generate single photons based on atomically thin WSe2 monolayers. The local strain in these monolayers produces a potential capable to trap single excitons and so produce single photon emission. These quantum dots can be easily coupled to Fabry-Pérot optical cavities, enhancing their performance towards competitive state-of-the-art single photon sources. First quantum communication testbed-applications with these emitters are being implemented, promising a “bright future” for these quantum photonic devices.
La conferencia tendrá lugar el miércoles 15 de febrero a las 12 horas en la Sala de Grados de la Facultad de Ciencias de la Universidad de Zaragoza.