127 citations · 439 across the 12 of their papers we have counts for
12 papers
Photon-energy-programmable subnanometric electron birth-site control
Hirofumi Yanagisawa, Abhisek Sinha, Ravi Kumar +2
Optical control of electron-generation sites has broadly enabled ultrafast nanoscale imaging, spectroscopy, and functional control. Existing approaches achieve nanoscale site selec…
Femtosecond Laser Induced Resonant Tunneling in an Individual Quantum Dot Attached to a Nanotip
Maxime Duchet, Sorin Perisanu, Stephen Purcell +6
Quantized nano-objects offer a myriad of exciting possibilities for manipulating electrons and light that impact photonics, nanoelectronics, and quantum information. In this contex…
Non-adiabatic ponderomotive effects in photoemission from nanotips in intense mid-infrared laser fields
Johannes Schötz, Sambit Mitra, Harald Fuest +10
Transient near-fields around metallic nanotips drive many applications, including the generation of ultrafast electron pulses and their use in electron microscopy. We have investig…
Optical Control of Young's Type Double-slit Interferometer for Laser-induced Electron Emission from a Nano-tip
Hirofumi Yanagisawa, Marcelo Ciappina, Christian Hafner +3
Interference experiments with electrons in a vacuum can illuminate both the quantum and the nanoscale nature of the underlying physics. An interference experiment requires two cohe…
Laser-induced asymmetric faceting and growth of nano-protrusion on a tungsten tip
Hirofumi Yanagisawa, Vahur Zadin, Karsten Kunze +7
Irradiation of a sharp tungsten tip by a femtosecond laser and exposed to a strong DC electric field led to gradual and reproducible surface modifications. By a combination of fiel…
Temporal and spectral disentanglement of laser-driven electron tunneling emission from a solid
Hirofumi Yanagisawa, Sascha Schnepp, Christian Hafner +4
By measuring energy spectra of the electron emission from a sharp tungsten tip induced by few-cycle laser pulses, the laser-field dependence of the emission mechanism was investiga…
Excitation of coherent phonons in the one-dimensional Bi(114) surface
D. Leuenberger, H. Yanagisawa, S. Roth +5
We present time-resolved photoemission experiments from a peculiar bismuth surface, Bi(114). The strong one-dimensional character of this surface is reflected in the Fermi surface,…
Site-Selective Field Emission Source by Femtosecond Laser Pulses and Its Emission Mechanism
Hirofumi Yanagisawa
Recent experimental and theoretical investigations on asymmetric field emission induced by weak femtosecond laser pulses and also its emission mechanisms are briefly reviewed. The…
Mechanism of Laser-induced Field Emission
Hirofumi Yanagisawa, Matthias Hengsberger, Dominik Leuenberger +4
We have measured electron energy distribution curves (EDCs) of the laser-induced field emission from a tungsten tip. Field emission from photo-excited nonequilibrium electron distr…
Laser-induced Field Emission from Tungsten Tip: Optical Control of Emission Sites and Emission Process
Hirofumi Yanagisawa, Christian Hafner, Patrick Doná +5
Field-emission patterns from a clean tungsten tip apex induced by femtosecond laser pulses have been investigated. Strongly asymmetric field-emission intensity distributions are ob…
Experimental Determination of Electron Transition Probabilities in Elementary Electron-Phonon Scattering Processes Using Electron-Energy-Loss Spectroscopy: The Example of Graphite
Hirofumi Yanagisawa, Toma Yorisaki, Ryota Niikura +4
We have investigated coupling constants in elementary electron-phonon scattering processes on a graphite surface by the combined use of high-resolution electron-energy-loss spectro…
Optical Control of Field-Emission Sites by Femtosecond Laser Pulses
Hirofumi Yanagisawa, Christian Hafner, Patrick Doná +5
We have investigated field emission patterns from a clean tungsten tip apex induced by femtosecond laser pulses. Strongly asymmetric modulations of the field emission intensity dis…