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Title: High-power tunable laser driven THz generation in corrugated plasma waveguides

Abstract

The excitation of Terahertz (THz) radiation by the interaction of an ultrashort laser pulse with the modes of a miniature corrugated plasma waveguide is considered. Here, the axially corrugated waveguide supports the electromagnetic modes with appropriate polarization and subluminal phase velocities that can be phase matched to the ponderomotive potential associated with the laser pulse, making significant THz generation possible. This process is studied via full format Particle-in-Cell simulations that, for the first time, model the nonlinear dynamics of the plasma and the self-consistent evolution of the laser pulse in the case where the laser pulse energy is entirely depleted. It is found that the generated THz is characterized by lateral emission from the channel, with a spectrum that may be narrow or broad depending on the laser intensity. A range of realistic laser pulse and plasma parameters is considered with the goal of maximizing the conversion efficiency of optical energy to THz radiation. As an example, a fixed drive pulse (0.55 J) with a spot size of 15 μm and a duration of 15 fs produces a THz radiation of 37.8 mJ of in a 1.5 cm corrugated plasma waveguide with an on axis average density of 1.4 ×more » 10 18 cm –3.« less

Authors:
ORCiD logo [1];  [2];  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Naval Research Lab., Washington, D.C. (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE
OSTI Identifier:
1543832
Alternate Identifier(s):
OSTI ID: 1361831
Grant/Contract Number:  
SC0010741
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics

Citation Formats

Miao, Chenlong, Palastro, John P., and Antonsen, Thomas M. High-power tunable laser driven THz generation in corrugated plasma waveguides. United States: N. p., 2017. Web. doi:10.1063/1.4981218.
Miao, Chenlong, Palastro, John P., & Antonsen, Thomas M. High-power tunable laser driven THz generation in corrugated plasma waveguides. United States. doi:10.1063/1.4981218.
Miao, Chenlong, Palastro, John P., and Antonsen, Thomas M. Tue . "High-power tunable laser driven THz generation in corrugated plasma waveguides". United States. doi:10.1063/1.4981218. https://www.osti.gov/servlets/purl/1543832.
@article{osti_1543832,
title = {High-power tunable laser driven THz generation in corrugated plasma waveguides},
author = {Miao, Chenlong and Palastro, John P. and Antonsen, Thomas M.},
abstractNote = {The excitation of Terahertz (THz) radiation by the interaction of an ultrashort laser pulse with the modes of a miniature corrugated plasma waveguide is considered. Here, the axially corrugated waveguide supports the electromagnetic modes with appropriate polarization and subluminal phase velocities that can be phase matched to the ponderomotive potential associated with the laser pulse, making significant THz generation possible. This process is studied via full format Particle-in-Cell simulations that, for the first time, model the nonlinear dynamics of the plasma and the self-consistent evolution of the laser pulse in the case where the laser pulse energy is entirely depleted. It is found that the generated THz is characterized by lateral emission from the channel, with a spectrum that may be narrow or broad depending on the laser intensity. A range of realistic laser pulse and plasma parameters is considered with the goal of maximizing the conversion efficiency of optical energy to THz radiation. As an example, a fixed drive pulse (0.55 J) with a spot size of 15 μm and a duration of 15 fs produces a THz radiation of 37.8 mJ of in a 1.5 cm corrugated plasma waveguide with an on axis average density of 1.4 × 1018 cm–3.},
doi = {10.1063/1.4981218},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 24,
place = {United States},
year = {2017},
month = {4}
}

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Cited by: 4 works
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