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10 March 2020 Ultrafast hot-electron transfer in metallic VSe2/graphene van der Waals heterostructures (Conference Presentation)
Tae Gwan Park, Byong Ki Choi, Junho Park, Jungdae Kim, Young Jun Chang, Fabian Rotermund
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Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 1127804 (2020) https://doi.org/10.1117/12.2544768
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Interlayer coupling in van der Waals heterostructures exhibits unique physical properties and presents a new pathway for diverse applications in materials science and photonics. Interestingly, photo-responsivity of graphene with semiconducting transition metal dichalcogenide (TMD) can be enhanced in the UV-visible range by interlayer charge/energy transfer. However, such an effect has been studied only for semiconducting materials. In this work, we will discuss ultrafast hot-electron transfer in atomically thin metallic-layer VSe2/graphene heterostructures investigated by time-resolved pump-probe spectroscopy. Our experimental finding extends the concepts of conventional two-dimensional heterostructures to metallic-layer and can provide a new degree of freedom for designing novel functionalized materials and devices.
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Tae Gwan Park, Byong Ki Choi, Junho Park, Jungdae Kim, Young Jun Chang, and Fabian Rotermund "Ultrafast hot-electron transfer in metallic VSe2/graphene van der Waals heterostructures (Conference Presentation)", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 1127804 (10 March 2020); https://doi.org/10.1117/12.2544768
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KEYWORDS
Heterojunctions
Ultrafast phenomena
Graphene
Phonons
Acoustics
Energy transfer
Picosecond phenomena
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