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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-8394
DTSTART:20231116T160000Z
DTEND:20231117T000000Z
DTSTAMP:20260414T044958Z
LAST-MODIFIED:20230824T152918Z
LOCATION:5310 Chamberlin
SUMMARY:Strongly interacting excitons and electrons in atomically thin
  semiconducting heterostructures\, R. G. Herb Condensed Matter Seminar
 \, You Zhou\, U Maryland
DESCRIPTION:Heterostructures of atomically thin semiconductors\, such 
 as transition metal dichalcogenides (TMDs)\, have recently emerged as 
 an exciting platform for exploring strongly interacting many-body syst
 ems of electrons and excitons. This talk focuses on our recent researc
 h investigating strong interactions among excitons and free carriers w
 ithin these systems\, shedding light on their relevance to Mott-Hubbar
 d physics and applications in nonlinear optics and nanophotonics. Firs
 t\, I will discuss how optical pumping in TMD trilayers can induce gia
 nt excitonic optical nonlinearity via exciton-hole interactions. I wil
 l then describe how we can combine optical pumping and electrostatic g
 ating to independently control the population of excitons and electron
 s in a TMD moiré system. This approach allows us to probe the intrica
 te phase diagram of a Hubbard model with hybrid Ferionic and Bosonic e
 xcitations\, leading to the observation of an excitonic Mott insulator
 . Lastly\, I will discuss how one can combine multiple layers of atomi
 cally thin excitonic materials to fabricate optical nano-cavities. The
  emphasis will be on the realization of light-matter interactions that
  are both chiral and electrically tunable using such cavities\, as wel
 l as the exploration of intriguing collective emitter states like supe
 r- and sub-radiance.
URL:https://www.physics.wisc.edu/events/?id=8394
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