Wavelength-dependent features of photoelectron spectra from nanotip photoemission

0543318 - FZÚ 2022 RIV CH eng J - Journal Article
Wu, X.-Y. - Liang, H. - Ciappina, Marcelo F. - Peng, L.-Y.
Wavelength-dependent features of photoelectron spectra from nanotip photoemission.
Photonics. Roč. 7, č. 4 (2020), č. článku 129. E-ISSN 2304-6732
R&D Projects: GA ČR(CZ) GC20-24805J
Institutional support: RVO:68378271
Keywords : photoemission * energy spectra * wavelength-dependent * nanostructures
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.676, year: 2020
Method of publishing: Open access

If a metal nanotip is irradiated with the light of a wavelength much larger than the nanotip's radius of curvature, optical near-fields become excited. These fields are responsible for distinct strong-field electron dynamics, due to both the field enhancement and spatial localization. By classical trajectory, Monte Carlo (CTMC) simulation, and the integration of the time-dependent Schrodinger equation (TDSE), we find that the photoelectron spectra for nanotip strong-field photoemission, irradiated by mid-infrared laser pulses, present distinctive wavelength-dependent features, especially in the mid- to high-electron energy regions, which are different from the well known ones. By extracting the electron trajectories from the CTMC simulation, we investigate these particular wavelength-dependent features. Our theoretical results contribute to understanding the photoemission and electron dynamics at nanostructures, and pave new pathways for designing high-energy nanometer-sized ultrafast electron sources.
Permanent Link: http://hdl.handle.net/11104/0320551