Strong terahertz radiation by beating of spatial-triangular lasers in a plasma

Anil K. Malik; Hitendra K. Malik; Ulrich Stroth

doi:10.1063/1.3626845

Strong terahertz radiation by beating of spatial-triangular lasers in a plasma

Anil K. Malik, Hitendra K. Malik, Ulrich Stroth

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

Resonant excitation of terahertz (THz) radiation by beating of two spatial-triangular laser beams having different frequencies and wave numbers but the same electric fields is proposed, where the ponderomotive force in the transverse direction is realized due to the beating and spatial variation of the lasers' fields. This gives rise to a stronger transient transverse current due to a sharp gradient in the laser field, and subsequently THz radiation is excited resonantly in the presence of a periodic density structure. The present scheme yields the THz field ∼10⁵ kV/cm and the efficiency ∼10^-2 for the laser intensity ∼10¹⁴ W/cm ².

Original language	English
Article number	071107
Journal	Applied Physics Letters
Volume	99
Issue number	7
DOIs	https://doi.org/10.1063/1.3626845
State	Published - 15 Aug 2011
Externally published	Yes

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title = "Strong terahertz radiation by beating of spatial-triangular lasers in a plasma",

abstract = "Resonant excitation of terahertz (THz) radiation by beating of two spatial-triangular laser beams having different frequencies and wave numbers but the same electric fields is proposed, where the ponderomotive force in the transverse direction is realized due to the beating and spatial variation of the lasers' fields. This gives rise to a stronger transient transverse current due to a sharp gradient in the laser field, and subsequently THz radiation is excited resonantly in the presence of a periodic density structure. The present scheme yields the THz field ∼105 kV/cm and the efficiency ∼10-2 for the laser intensity ∼1014 W/cm 2.",

author = "Malik, {Anil K.} and Malik, {Hitendra K.} and Ulrich Stroth",

note = "Funding Information: This work was supported by the Indo-German joint research project under the DST-DAAD PPP-2010 Programme.",

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AU - Malik, Anil K.

AU - Malik, Hitendra K.

AU - Stroth, Ulrich

N1 - Funding Information: This work was supported by the Indo-German joint research project under the DST-DAAD PPP-2010 Programme.

PY - 2011/8/15

Y1 - 2011/8/15

N2 - Resonant excitation of terahertz (THz) radiation by beating of two spatial-triangular laser beams having different frequencies and wave numbers but the same electric fields is proposed, where the ponderomotive force in the transverse direction is realized due to the beating and spatial variation of the lasers' fields. This gives rise to a stronger transient transverse current due to a sharp gradient in the laser field, and subsequently THz radiation is excited resonantly in the presence of a periodic density structure. The present scheme yields the THz field ∼105 kV/cm and the efficiency ∼10-2 for the laser intensity ∼1014 W/cm 2.

AB - Resonant excitation of terahertz (THz) radiation by beating of two spatial-triangular laser beams having different frequencies and wave numbers but the same electric fields is proposed, where the ponderomotive force in the transverse direction is realized due to the beating and spatial variation of the lasers' fields. This gives rise to a stronger transient transverse current due to a sharp gradient in the laser field, and subsequently THz radiation is excited resonantly in the presence of a periodic density structure. The present scheme yields the THz field ∼105 kV/cm and the efficiency ∼10-2 for the laser intensity ∼1014 W/cm 2.

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JO - Applied Physics Letters

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ER -

Strong terahertz radiation by beating of spatial-triangular lasers in a plasma

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