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Hur, Min Sup
Computational Plasma Lab
Research Interests
  • Laser-Plasma Electron Accelerator and Table-top Femto Hard X-ray generation
  • Plasma-based THz generation
  • PIC and fluid code development
  • Reduced Laser-Plasma modelling
  • Capillary Discharge Systems for Guidied Laser Wakefield Accelerators

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Strong terahertz emission from electromagnetic diffusion near cutoff in plasma

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Title
Strong terahertz emission from electromagnetic diffusion near cutoff in plasma
Author
Cho, M-HKim, Y-KSuk, H.Ersfeld, B.Jaroszynski, D. A.Hur, Min Sup
Issue Date
2015-04
Publisher
IOP PUBLISHING LTD
Citation
NEW JOURNAL OF PHYSICS, v.17, pp.043045
Abstract
Anew mechanism for electromagnetic emission in the terahertz (THz) frequency regime from laser-plasma interactions is described. A localized and long-lasting transverse current is produced by two counter-propagating short laser pulses in weakly magnetized plasma. We show that the electromagnetic wave radiating from this current source, even though its frequency is close to cut-off of the ambient plasma, grows and diffuses towards the plasma-vacuum boundary, emitting a strong monochromatic THz wave. With driving laser pulses of moderate power, the THz wave has a field strength of tens of MV m(-1), a frequency of a few THz and a quasi-continuous power that exceeds all previous monochromatic THz sources. The novelty of the mechanism lies in a diffusing electromagnetic wave close to cut-off, which is modelled by a continuously driven complex diffusion equation
URI
https://scholarworks.unist.ac.kr/handle/201301/17421
URL
http://iopscience.iop.org/article/10.1088/1367-2630/17/4/043045/meta;jsessionid=9C27BD3B406B2F50A6BCA360AF953A1A.c1
DOI
10.1088/1367-2630/17/4/043045
ISSN
1367-2630
Appears in Collections:
PHY_Journal Papers
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