Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper EI_3a_2

Multiple ionization of noble gases by intense femtosecond laser pulses enhances THz generation

Not Accessible

Your library or personal account may give you access

Abstract

Over the past decade, the increasing potential of terahertz (THz) radiation in many societal areas has stimulated intensive efforts to develop efficient low-frequency sources based on nonlinear optics or laser-created plasmas. By letting an ultrashort laser field with one or several colors ionize a noble gas, intense THz pulses can be produced. For strong laser intensities between 1014 Wcm2 and 1017 Wcm2, the observed THz radiation has recently been explained by a 1D fluid-Maxwell model [1] and shown to be mainly triggered by two mechanisms: the plasma current oscillations and the ionization-induced photocurrents [2]. For practical applications a key issue is to understand how the THz pulse energy increases with the laser and material parameters. So far, most theoretical studies have considered either hydrogen or singly ionizable gas targets, while experiments routinely employ molecular or noble gases whose shell structures are not limited to one extractable electron. Here, we examine theoretically and numerically the dependence of the laser-driven THz radiation on the laser intensity in the context of multiple ionization of helium and argon for non-relativistic intensities up to 1017 Wcm−2.

© 2015 IEEE

PDF Article
More Like This
Spatially-resolved blueshifting of third harmonic and fundamental femtosecond pulses during high intensity ionization of subatmospheric density noble gases

C.W. Siders, E. Gaul, M.C. Downer, A. Babine, and A. Stepanov
MB2 High Resolution Fourier Transform Spectroscopy (FTS) 1994

Resonant multiphoton Ionization of noble gases by intense picosecond UV laser radiation

O. L. LANDEN, M. D. PERRY, and ABRAHAM SZOKE
WHH2 Quantum Electronics and Laser Science Conference (CLEO:FS) 1989

Laser Ionization of Noble Gases: Polarization and Pulse Width Effects

D. D. Meyerhofer, S. Augst, B. Buerke, and J. Peatross
PWe008 International Quantum Electronics Conference (IQEC) 1992

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved