Wavelength-Dependent Features of Photoelectron Spectra from Nanotip Photoemission

Xiao-Yuan Wu; Hao Liang; Marcelo F. Ciappina; Liang-You Peng

doi:10.3390/photonics7040129

Wavelength-Dependent Features of Photoelectron Spectra from Nanotip Photoemission

Xiao-Yuan Wu, Hao Liang, Marcelo F. Ciappina, Liang-You Peng^*

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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Abstract

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 Schrödinger 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.

Original language	English
Journal	Photonics
DOIs	https://doi.org/10.3390/photonics7040129
State	Published - 11 Dec 2020

Keywords

photoemission
energy spectra
wavelength-dependent
nanostructures

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10.3390/photonics7040129License: CC BY

photonics-07-00129-v2Final published version, 2.67 MB

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@article{32ed88fe75de41ef9dfb41e8615d31aa,

title = "Wavelength-Dependent Features of Photoelectron Spectra from Nanotip Photoemission",

abstract = "If a metal nanotip is irradiated with the light of a wavelength much larger than the nanotip{\textquoteright}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 Schr{\"o}dinger 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.",

keywords = "photoemission, energy spectra, wavelength-dependent, nanostructures",

author = "Xiao-Yuan Wu and Hao Liang and Ciappina, {Marcelo F.} and Liang-You Peng",

year = "2020",

month = dec,

day = "11",

doi = "10.3390/photonics7040129",

language = "英语",

journal = "Photonics",

issn = "2304-6732",

publisher = "MDPI AG",

}

TY - JOUR

T1 - Wavelength-Dependent Features of Photoelectron Spectra from Nanotip Photoemission

AU - Wu, Xiao-Yuan

AU - Liang, Hao

AU - Ciappina, Marcelo F.

AU - Peng, Liang-You

PY - 2020/12/11

Y1 - 2020/12/11

N2 - 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 Schrödinger 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.

AB - 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 Schrödinger 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.

KW - photoemission

KW - energy spectra

KW - wavelength-dependent

KW - nanostructures

U2 - 10.3390/photonics7040129

DO - 10.3390/photonics7040129

M3 - 文章

SN - 2304-6732

JO - Photonics

JF - Photonics

ER -

Wavelength-Dependent Features of Photoelectron Spectra from Nanotip Photoemission

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