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20 August 2020 Exciton dynamics in monolayer semiconductors
Alexey Chernikov
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Proceedings Volume 11499, Terahertz Emitters, Receivers, and Applications XI; 114990X (2020) https://doi.org/10.1117/12.2568429
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Abstract
Fundamental optoelectronic excitations in two-dimensional van der Waals materials are determined by strong Coulomb interaction. The resulting exciton complexes govern the response of the materials to external fields and offer a flexible platform to study many-body interactions in solids. Both optical and terahertz spectroscopy offer direct approaches to investigate their fundamental properties and monitor their dynamics. Here, I will address the topics of exciton dynamics probed by optical and THz spectroscopy and focus on environmental energy fluctuations and exciton propagation in monolayer semiconductors. I will present an alternative, fundamental source of disorder based entirely on the local changes of the Coulomb interaction with major consequences for optics and transport. Time-resolved microscopy measurements of exciton propagation will be presented for both linear and non-linear regime with an outlook towards opportunities for time-resolved terahertz spectroscopy.
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Alexey Chernikov "Exciton dynamics in monolayer semiconductors", Proc. SPIE 11499, Terahertz Emitters, Receivers, and Applications XI, 114990X (20 August 2020); https://doi.org/10.1117/12.2568429
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KEYWORDS
Excitons
Semiconductors
Dielectrics
Terahertz spectroscopy
Condensed matter
Nonlinear optics
Optoelectronics
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