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Coherent control of boosted terahertz radiation from air plasma pumped by femtosecond three-color sawtooth field

Abstract : We report on the coherent control of boosted ultrashort terahertz pulse emitted from air plasma pumped by a femtosecond sawtooth pulse composed of three optical harmonic fields. With an in-line optical setup, the relative phases between the three optical components of the pump pulse can be varied independently with attosecond precision without the complexity of external phase stabilization. We observe that the amplitude of the terahertz emission pumped by the phase-optimized sawtooth wave is enhanced by 1.8 times compared to the widely used two-color scheme. Moreover, by manipulating the relative phases between the three colors at attosecond precision, coherent control of the azimuthal angle, ellipticity, and polarity of THz radiation is achieved. A local current model reproduces well the coherent control observations.
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https://hal.archives-ouvertes.fr/hal-03076907
Contributor : Aurélien Houard <>
Submitted on : Wednesday, December 16, 2020 - 3:15:43 PM
Last modification on : Friday, January 29, 2021 - 9:48:20 AM
Long-term archiving on: : Wednesday, March 17, 2021 - 7:31:30 PM

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Shaojie Liu, Zhengquan Fan, Chenhui Lu, Jieyu Gui, Cheng Luo, et al.. Coherent control of boosted terahertz radiation from air plasma pumped by femtosecond three-color sawtooth field. Physical Review A, American Physical Society 2020, 102 (6), pp.063522. ⟨10.1103/PhysRevA.102.063522⟩. ⟨hal-03076907⟩

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