Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air

Zhen Zhang; N. Panov; Vera Andreeva; Zhelin Zhang; A. Slepkov; D. Shipilo; M. D. Thomson; Tie Jun Wang; I. Babushkin; A. Demircan; U. Morgner; Yanping Chen; O. Kosareva; A. Savel'Ev

doi:10.1063/1.5053893

Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air

Zhen Zhang, N. Panov, Vera Andreeva, Zhelin Zhang, A. Slepkov, D. Shipilo, M. D. Thomson, Tie Jun Wang, I. Babushkin, A. Demircan, U. Morgner, Yanping Chen, O. Kosareva, A. Savel'Ev

School of Mathematics

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

40 Scopus citations

Abstract

We compare detailed spatio-temporal propagation simulations with experiments on generation of terahertz (THz) pulses in single filaments with two-color optical excitation, which elucidates the mechanism whereby positively chirped optical pulses lead to the maximum THz yield. The long-wavelength components in the leading edge of the positively chirped 2ω-pulse preserve the overlap with the ω-pulse. The THz yield is extremely sensitive to the temporal overlap: for a 35-fs ω-pulse, the yield decreases by an order of magnitude upon a ω-2ω pulse shift of only 5 fs.

Original language	English (US)
Article number	241103
Journal	Applied Physics Letters
Volume	113
Issue number	24
DOIs	https://doi.org/10.1063/1.5053893
State	Published - Dec 10 2018

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10.1063/1.5053893

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title = "Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air",

abstract = "We compare detailed spatio-temporal propagation simulations with experiments on generation of terahertz (THz) pulses in single filaments with two-color optical excitation, which elucidates the mechanism whereby positively chirped optical pulses lead to the maximum THz yield. The long-wavelength components in the leading edge of the positively chirped 2ω-pulse preserve the overlap with the ω-pulse. The THz yield is extremely sensitive to the temporal overlap: for a 35-fs ω-pulse, the yield decreases by an order of magnitude upon a ω-2ω pulse shift of only 5 fs.",

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T1 - Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air

AU - Zhang, Zhen

AU - Panov, N.

AU - Andreeva, Vera

AU - Zhang, Zhelin

AU - Slepkov, A.

AU - Shipilo, D.

AU - Thomson, M. D.

AU - Wang, Tie Jun

AU - Babushkin, I.

AU - Demircan, A.

AU - Morgner, U.

AU - Chen, Yanping

AU - Kosareva, O.

AU - Savel'Ev, A.

PY - 2018/12/10

Y1 - 2018/12/10

N2 - We compare detailed spatio-temporal propagation simulations with experiments on generation of terahertz (THz) pulses in single filaments with two-color optical excitation, which elucidates the mechanism whereby positively chirped optical pulses lead to the maximum THz yield. The long-wavelength components in the leading edge of the positively chirped 2ω-pulse preserve the overlap with the ω-pulse. The THz yield is extremely sensitive to the temporal overlap: for a 35-fs ω-pulse, the yield decreases by an order of magnitude upon a ω-2ω pulse shift of only 5 fs.

AB - We compare detailed spatio-temporal propagation simulations with experiments on generation of terahertz (THz) pulses in single filaments with two-color optical excitation, which elucidates the mechanism whereby positively chirped optical pulses lead to the maximum THz yield. The long-wavelength components in the leading edge of the positively chirped 2ω-pulse preserve the overlap with the ω-pulse. The THz yield is extremely sensitive to the temporal overlap: for a 35-fs ω-pulse, the yield decreases by an order of magnitude upon a ω-2ω pulse shift of only 5 fs.

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Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air

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