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- W2891424054 abstract "We demonstrate subcycle electron pulse generation in a nanogap of graphene when irradiated by a femtosecond laser pulse in the near-infrared region (800 nm). A strong photoinduced emission was produced when the gap area was irradiated by the ultrashort pulse laser. The graphene, which has atomically sharp edges with a large damage threshold, enables us to achieve a strong tunneling regime for the subcycle field emission. The photoinduced signals exhibited an anomalous increase in nonlinear order as a function of incident pulse energy in the presence of static electric field. A dynamical analysis of tunneling electrons based on the semiclassical model, which considers the contribution from the recoil electrons, reproduced our observation successfully. The large field enhancement near the graphene edge enabled us to reach the deep tunneling regime with the extraordinary Keldysh parameter of 0.2 in the near-infrared region, which has not been accessible by conventional metal nanostructures." @default.
- W2891424054 created "2018-09-27" @default.
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- W2891424054 date "2018-09-12" @default.
- W2891424054 modified "2023-10-18" @default.
- W2891424054 title "Ultrafast Strong-Field Tunneling Emission in Graphene Nanogaps" @default.
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- W2891424054 doi "https://doi.org/10.1021/acsphotonics.8b00857" @default.
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