Presentation
17 March 2023 Visualizing ultrafast lattice dynamics at 2D van der Waals interfaces using femtosecond electron diffraction
Archana Raja
Author Affiliations +
Abstract
Two-dimensional semiconductors prepared from van der Waals crystals of transition metal dichalcogenides are a burgeoning area of research with unique layer-dependent optoelectronic properties. Atomically precise junctions can be assembled by mechanically placing two such semiconductor monolayers on top of each other without any constraints of epitaxy or covalent bonding. In this talk I will describe our efforts to uncover the role of layer-hybridized electronic states as a powerful route to control ultrafast energy transport across such 2D heterojunctions by using a combination of ultrafast electron diffraction thermometry and first-principles calculations. Our experiments and theory present a new understanding of the microscopic origins of ultrafast charge and energy transport across two dimensional heterostructures.
Conference Presentation
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Archana Raja "Visualizing ultrafast lattice dynamics at 2D van der Waals interfaces using femtosecond electron diffraction", Proc. SPIE PC12430, Quantum Sensing and Nano Electronics and Photonics XIX, PC124300U (17 March 2023); https://doi.org/10.1117/12.2654996
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KEYWORDS
Ultrafast phenomena

Diffraction

Femtosecond phenomena

Human-machine interfaces

Visualization

Heterojunctions

Picosecond phenomena

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