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This article is cited in 8 scientific papers (total in 8 papers)
Interaction of laser radiation with matter
Characteristics of quasi-unipolar electromagnetic pulses formed in the interaction of high-power laser pulses with nanoscale targets
V. V. Kulaginab, V. N. Kornienkob, V. A. Cherepeninb, D. N. Guptac, H. Sukde a Lomonosov Moscow State University, P. K. Sternberg Astronomical Institute
b Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow
c Department of Physics and Astrophysics, University of Delhi North Campus, University of Delhi, India
d Advanced Photonics Research Institute Gwangju Institute of Science and Technology, South Korea
e Department of Physics and Photon Science, Gwangju Institute of Science and Technology, South Korea
Abstract:
A new method is suggested for generating quasi-unipolar electromagnetic IR and terahertz pulses. The method is based on synchronous acceleration of electrons combined to a dense bunch with a charge of up to several tens nanocoulombs, which are forced out from a nanoscale target under an action of a high-power, sharpleading edge laser pulse. The electromagnetic bunch moving in a field of laser radiation can generate high-power electromagnetic pulses with various spectral composition including terahertz and IR ranges. A physical mechanism underlying the formation of generated quasi-unipolar pulses of electromagnetic radiation is determined and numerically studied. The pulse characteristics are found by numerical simulation, such as amplitude and duration dependences on the angle between the pulse propagation direction and laser beam axis. It is established that in modern laser installations, the amplitudes of quasi-unipolar pulses may reach relativistic values. Reflection of a unipolar pulse from an ideally reflecting surface is numerically analysed. It is shown that the pulse retains its unipolar profile in this case.
Keywords:
interaction of high-power laser pulses with matter, electron acceleration by laser pulses, generation of terahertz and IR radiation, nanoscale targets.
Received: 06.01.2019 Revised: 28.03.2019
Citation:
V. V. Kulagin, V. N. Kornienko, V. A. Cherepenin, D. N. Gupta, H. Suk, “Characteristics of quasi-unipolar electromagnetic pulses formed in the interaction of high-power laser pulses with nanoscale targets”, Kvantovaya Elektronika, 49:8 (2019), 788–795 [Quantum Electron., 49:8 (2019), 788–795]
Linking options:
https://www.mathnet.ru/eng/qe17091 https://www.mathnet.ru/eng/qe/v49/i8/p788
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