Superfluorescence in Lead Halide Perovskite Nanocrystal Assemblies
Dr. Thilo Stöferle, IBM Research Zurich (Switzerland)
16/12/2021, 12:00 MSK / 10:00 CET
Abstract
In recent years, fully inorganic cesium lead halide nanocrystals have emerged as a new, promising class of optoelectronic materials. They exhibit giant oscillator strength and long dephasing time at cryogenic temperature as well as low inhomogeneous energetic broadening, which makes them ideally suited to explore settings that exploit their exceptionally strong intrinsic light-matter coupling. Through drying-mediated self-assembly of the colloidal nanocrystals, we can realize various superlattice geometries where we observe coherent, cooperative emission, so-called superfluorescence. There the quantum dots spontaneously synchronize, thereby forming effectively a giant dipole and emitting an intense burst of light with characteristic signatures that will be discussed for different superlattice assemblies.
About the speaker
Thilo Stöferle received his PhD in physics in 2005 on atomic quantum gases in optical lattices at the ETH Zurich in the quantum optics group of Prof. T. Esslinger, for which he was awarded the Medal of the ETH Zurich and the Dimitris N. Chorafas prize. In 2006, he joined IBM Research – Zurich, working on optoelectronic materials, nanophotonics and photonic integrated circuits with conjugated polymers and colloidal nanocrystals. His current research interests are on perovskite nanocrystals and exciton-polariton condensates for all-optical logic circuits and polariton lattices.
Date & Location
Date & Location
The event will be taking place on the 27th of December 2021 at 12 am MSK time (10 am CET).
Access details: Zoom (Meeting ID: 962 4930 8286 / Passcode: 457552)
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