Tunable circularly polarized terahertz radiation from magnetized gas plasma

W.-M. Wang, P. Gibbon, Z.-M. Sheng, Y.-T. Li

Research output: Contribution to journalLetter

45 Citations (Scopus)
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Abstract

It is shown, by simulation and theory, that circularly or elliptically polarized terahertz radiation can be generated when a static magnetic (B) field is imposed on a gas target along the propagation direction of a two-color laser driver. The radiation frequency is determined by ω2p+ω2c/4−−−−−−−−√+ωc/2, where ωp is the plasma frequency and ωc is the electron cyclotron frequency. With the increase of the B field, the radiation changes from a single-cycle broadband waveform to a continuous narrow-band emission. In high-B-field cases, the radiation strength is proportional to ω2p/ωc. The B field provides a tunability in the radiation frequency, spectrum width, and field strength.
Original languageEnglish
Article number253901
Number of pages5
JournalPhysical Review Letters
Volume114
Issue number25-26
DOIs
Publication statusPublished - 23 Jun 2015

Fingerprint

polarized radiation
radiation
gases
cyclotron frequency
plasma frequencies
narrowband
field strength
waveforms
broadband
color
cycles
propagation
lasers
electrons
simulation

Keywords

  • elliptically polarized terahertz radiation
  • two-color laser driver
  • radiation frequency
  • spectrum width
  • field strength

Cite this

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title = "Tunable circularly polarized terahertz radiation from magnetized gas plasma",
abstract = "It is shown, by simulation and theory, that circularly or elliptically polarized terahertz radiation can be generated when a static magnetic (B) field is imposed on a gas target along the propagation direction of a two-color laser driver. The radiation frequency is determined by ω2p+ω2c/4−−−−−−−−√+ωc/2, where ωp is the plasma frequency and ωc is the electron cyclotron frequency. With the increase of the B field, the radiation changes from a single-cycle broadband waveform to a continuous narrow-band emission. In high-B-field cases, the radiation strength is proportional to ω2p/ωc. The B field provides a tunability in the radiation frequency, spectrum width, and field strength.",
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author = "W.-M. Wang and P. Gibbon and Z.-M. Sheng and Y.-T. Li",
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language = "English",
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Tunable circularly polarized terahertz radiation from magnetized gas plasma. / Wang, W.-M.; Gibbon, P.; Sheng, Z.-M.; Li, Y.-T.

In: Physical Review Letters, Vol. 114, No. 25-26, 253901, 23.06.2015.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Tunable circularly polarized terahertz radiation from magnetized gas plasma

AU - Wang, W.-M.

AU - Gibbon, P.

AU - Sheng, Z.-M.

AU - Li, Y.-T.

PY - 2015/6/23

Y1 - 2015/6/23

N2 - It is shown, by simulation and theory, that circularly or elliptically polarized terahertz radiation can be generated when a static magnetic (B) field is imposed on a gas target along the propagation direction of a two-color laser driver. The radiation frequency is determined by ω2p+ω2c/4−−−−−−−−√+ωc/2, where ωp is the plasma frequency and ωc is the electron cyclotron frequency. With the increase of the B field, the radiation changes from a single-cycle broadband waveform to a continuous narrow-band emission. In high-B-field cases, the radiation strength is proportional to ω2p/ωc. The B field provides a tunability in the radiation frequency, spectrum width, and field strength.

AB - It is shown, by simulation and theory, that circularly or elliptically polarized terahertz radiation can be generated when a static magnetic (B) field is imposed on a gas target along the propagation direction of a two-color laser driver. The radiation frequency is determined by ω2p+ω2c/4−−−−−−−−√+ωc/2, where ωp is the plasma frequency and ωc is the electron cyclotron frequency. With the increase of the B field, the radiation changes from a single-cycle broadband waveform to a continuous narrow-band emission. In high-B-field cases, the radiation strength is proportional to ω2p/ωc. The B field provides a tunability in the radiation frequency, spectrum width, and field strength.

KW - elliptically polarized terahertz radiation

KW - two-color laser driver

KW - radiation frequency

KW - spectrum width

KW - field strength

UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.253901

U2 - 10.1103/PhysRevLett.114.253901

DO - 10.1103/PhysRevLett.114.253901

M3 - Letter

VL - 114

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 25-26

M1 - 253901

ER -