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31 August 2020 Exciton propagation in monolayer semiconductors and hybrid materials
Alexey Chernikov
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Proceedings Volume 11464, Physical Chemistry of Semiconductor Materials and Interfaces XIX; 1146402 (2020) https://doi.org/10.1117/12.2568466
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Transport of optical excitations in semiconducting solids plays a central role from both fundamental and technological perspectives. In systems with strong Coulomb interaction the propagation of optically injected carriers is dominated by excitons that can affect the energy landscape and the interactions with vibrational modes, with an overall strong impact on the mobility. Here, I will present recent studies of exciton diffusion in van der Waals semiconductors and hybrid two-dimensional materials, monitored via time-resolved optical microscopy. I will discuss linear and non-linear phenomena arising from efficient interactions across characteristic temperature regimes. Particular focus will be placed on the impact of interactions with vibrational modes and the influence of local fluctuations in the dielectric environment. Finally, I will discuss the interplay between free carriers and excitons and potential impact of quantum interference effects in exciton transport.
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Alexey Chernikov "Exciton propagation in monolayer semiconductors and hybrid materials", Proc. SPIE 11464, Physical Chemistry of Semiconductor Materials and Interfaces XIX, 1146402 (31 August 2020); https://doi.org/10.1117/12.2568466
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KEYWORDS
Excitons
Semiconductors
Semiconductor materials
Dielectrics
Diffusion
Electrons
Optical microscopy
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