P. C. Cross Endowed Lecture in Physical Chemistry: Maksym Kovalenko

Event interval: Single day event
Campus location: Bagley Hall (BAG)
Campus room: BAG 154
Accessibility Contact: chem59x@uw.edu
Event Types: Lectures/Seminars
Event sponsors: This lecture is supported by the Paul C. Cross Endowed Fund, dedicated to the memory of Professor Paul C. Cross by his family and many friends and colleagues in 2002.
Prof. Cross was a distinguished physical chemist who led the effort to elevate the UW Department of Chemistry to national prominence when he served as professor and chair from 1949 to 1961. Prof. Cross promoted departmental growth through the expansion of the graduate program, his emphasis on the acquisition and construction of revolutionary new instrumentation, and his encouragement of faculty to secure external federal funding to expand their research programs.
Link: https://kovalenkolab.ethz.ch/research.html

P. C. Cross Endowed Lecture in Physical Chemistry

"Quantum light sources using colloidal perovskite quantum dots"
Professor Maksym Kovalenko - Department of Chemistry and Applied Biosciences, ETH Zurich
Host: David Ginger

Lead halide perovskite nanocrystals (LHP NCs) – the latest generation of colloidal quantum dots (QDs) – are intrinsically bright emitters without the need for epitaxial wide-bandgap shells. In recent years, LHP NCs have emerged as the most intensively studied QD material, challenging the field's foundational paradigms in nearly every respect. They are the first QDs to exhibit excitonic coherence on timescales comparable to their radiative lifetimes (at cryogenic temperatures), thus setting the stage for their use as sources of indistinguishable photons. Their giant oscillator strength effect enables extremely fast emission (lifetimes as short as 60 ps) even in relatively large NCs, while maintaining single-photon emission. Periodic ensembles of LHP NCs have further demonstrated collective, accelerated radiative decay – superfluorescence – a phenomenon previously unseen in colloidal systems. The excitonic fine structure of LHP NCs can be readily engineered through shape anisotropy. Furthermore, by simple near-field coupling to highly chiral plasmonic nanostructures, their otherwise linearly polarized emission becomes fully chiral, establishing LHP NCs as the first fully chiral colloidal single-photon emitters. LHP NCs are therefore attractive as scalable, chemically synthesized quantum dot materials for applications in quantum imaging, sensing, communication or even computing. The presentation will summarize the contributions of my interdisciplinary team and our international collaborators, whose names will be acknowledged in the presentation and accompanying notes.