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10 March 2020 Pulse duration effects on Valley-selective Floquet-Bloch states in monolayer transition metal dichalcogenides (Conference Presentation)
Stuart Earl, Mitchell Conway, Jack Muir, Jonathan Tollerud, Jeffrey Davis
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Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 112781D (2020) https://doi.org/10.1117/12.2547180
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Monolayer transition metal dichalcogenides present the opportunity to manipulate quantum states of matter via ultrafast laser pulses, permitting, for example, observation of the phase transition from trivial to topological insulator. However, the nature of ultrafast pulses are far removed from the theoretical assumptions used to model these phenomena. We have used ultrafast pump-probe spectroscopy to observe the influence of an ultrashort laser pulse on the coherent response of monolayers of MoS2 and WS2 to investigate how an ultrashort pulse may cause the system to deviate from the behaviour expected from theoretical predictions.
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Stuart Earl, Mitchell Conway, Jack Muir, Jonathan Tollerud, and Jeffrey Davis "Pulse duration effects on Valley-selective Floquet-Bloch states in monolayer transition metal dichalcogenides (Conference Presentation)", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112781D (10 March 2020); https://doi.org/10.1117/12.2547180
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KEYWORDS
Transition metals
Ultrafast phenomena
Semiconductors
Spectroscopy
Ultrafast laser spectroscopy
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