<div class="csl-bib-body">
<div class="csl-entry">Kumlin, J. P. (2024, December 10). <i>Cooperative Emission Dynamics in 2D Quantum Materials</i> [Presentation]. Seminar Talk IFA Aarhus University, Aarhus, Denmark.</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/209531
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dc.description.abstract
Two-dimensional semiconductors, such as atomically thin transition-metal dichalcogenides and their moiré heterostructures, have recently emerged as a fascinating platform for exploring the rich many-body physics of electrons and excitons. These heterostructures enable strong light-matter coupling, providing a promising quantum optics platform where the regular arrangement of long-lived excitons leads to cooperative effects and enhanced light-matter interactions. Additionally, the strong exciton-exciton interactions inherent to these systems give rise to significant nonlinear optical phenomena.
In the first part of this talk, I will discuss the cooperative radiance of moiré excitons, which arises from the deep-subwavelength nature of the moiré lattice and strong excitonic interactions. In particular, I will examine the role of static dipole-dipole interactions between interlayer excitons, demonstrating their substantial impact on cooperative optical properties. I will also highlight how doping with electrons allows for direct control of optical cooperativity, such as enabling superradiant dynamics in othersie subradiant excitonic states.
In the second part, I will present recent collaborative work with Ajit Srivastava's group at Emory University. Here, we identify signatures of ferroelectric ordering of excitons near the Mott insulating state in a WSe₂/WS₂ heterobilayer, as revealed through their emission dynamics.
en
dc.description.sponsorship
European Commission
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dc.language.iso
en
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dc.subject
Quantum Many-Body Physics
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dc.subject
Superradiance
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dc.subject
Excitons
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dc.subject
Moire systems
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dc.title
Cooperative Emission Dynamics in 2D Quantum Materials
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
101106552
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dc.type.category
Presentation
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tuw.publication.invited
invited
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tuw.project.title
Vielteilchen-Quantenoptik in geordneten, niedrigdimensionalen System
