QuCoLiMa Talk – Thilo Stöferle – Superfluorescence in Lead Halide Perovskite Nanocrystals

Speaker:

Thilo Stöferle - IBM Research - Zurich

Title:

Superfluorescence in Lead Halide Perovskite Nanocrystals

Abstract:

Fully inorganic cesium lead halide perovskite nanocrystals have emerged as an interesting optoelectronic material due to several extraordinary properties. 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 and collective effects. Through drying-mediated self-assembly of the colloidal nanocrystals, we can realize various superlattice geometries where we observe coherent, cooperative emission. After optical excitation, the quantum dots spontaneously synchronize, thereby effectively emitting an intense burst of light with characteristic signatures of superfluorescence that will be discussed for different superlattice assemblies. Moreover, using thin films of giant perovskite nanocrystals, we investigate temperature- and density-driven transitions between superfluorescence and amplified spontaneous emission regimes.

Location:

Zoom

All talks hybrid:

Mixture of on-site talks at the main sites of QuCoLiMa (Erlangen, Mainz, Saarbrücken) as well as online talks. Regardless of where the talks are given, they are livestreamed via Zoom and can be watched from home/office or cooperatively in the meeting rooms.

Zoom-Link:

http://www.qucolima.de/join-qucolima-talk

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QuCoLiMa Talks are regular seminars of the collaborative research center TRR 306 QuCoLiMa (Quantum Cooperativity of Light and Matter), where (external) experts are invited to present their work.

More information at http://www.qucolima.de/talks