Transformation of terahertz spectra emitted from dual-frequency femtosecond pulse interaction in gases

A. V. Borodin; N. A. Panov; O. G. Kosareva; V. A. Andreeva; M. N. Esaulkov; V. A. Makarov; A. P. Shkurinov; S. L. Chin; X. C. Zhang

doi:10.1364/OL.38.001906

Transformation of terahertz spectra emitted from dual-frequency femtosecond pulse interaction in gases

A. V. Borodin, N. A. Panov, O. G. Kosareva, V. A. Andreeva, M. N. Esaulkov, V. A. Makarov, A. P. Shkurinov, S. L. Chin, X. C. Zhang

Mathematics

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Abstract

We demonstrate that the two basic physical mechanisms of terahertz (THz) generation in a femtosecond filament, namely, the free electron photocurrent and the nonlinear polarization of neutrals, can be identified through the spectral analysis of THz radiation. The contribution from the photocurrent peaks at the units of THz, while the neutrals yield the peak at the tens of THz. We suggest the practical implementation of such spectral analysis by varying the initial transform-limited laser pulse duration.

Original language	English (US)
Pages (from-to)	1906-1908
Number of pages	3
Journal	Optics Letters
Volume	38
Issue number	11
DOIs	https://doi.org/10.1364/OL.38.001906
State	Published - Jun 1 2013

Bibliographical note

Funding Information:
We wish to thank S. Efrima and B. Vlcková for numerous discussions and B. Vlcková for allowing us to visit her laboratory. This research has been supported by the Natural Sciences and Engineering Research Council of Canada.

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title = "Transformation of terahertz spectra emitted from dual-frequency femtosecond pulse interaction in gases",

abstract = "We demonstrate that the two basic physical mechanisms of terahertz (THz) generation in a femtosecond filament, namely, the free electron photocurrent and the nonlinear polarization of neutrals, can be identified through the spectral analysis of THz radiation. The contribution from the photocurrent peaks at the units of THz, while the neutrals yield the peak at the tens of THz. We suggest the practical implementation of such spectral analysis by varying the initial transform-limited laser pulse duration.",

author = "Borodin, {A. V.} and Panov, {N. A.} and Kosareva, {O. G.} and Andreeva, {V. A.} and Esaulkov, {M. N.} and Makarov, {V. A.} and Shkurinov, {A. P.} and Chin, {S. L.} and Zhang, {X. C.}",

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T1 - Transformation of terahertz spectra emitted from dual-frequency femtosecond pulse interaction in gases

AU - Borodin, A. V.

AU - Panov, N. A.

AU - Kosareva, O. G.

AU - Andreeva, V. A.

AU - Esaulkov, M. N.

AU - Makarov, V. A.

AU - Shkurinov, A. P.

AU - Chin, S. L.

AU - Zhang, X. C.

N1 - Funding Information: We wish to thank S. Efrima and B. Vlcková for numerous discussions and B. Vlcková for allowing us to visit her laboratory. This research has been supported by the Natural Sciences and Engineering Research Council of Canada.

PY - 2013/6/1

Y1 - 2013/6/1

N2 - We demonstrate that the two basic physical mechanisms of terahertz (THz) generation in a femtosecond filament, namely, the free electron photocurrent and the nonlinear polarization of neutrals, can be identified through the spectral analysis of THz radiation. The contribution from the photocurrent peaks at the units of THz, while the neutrals yield the peak at the tens of THz. We suggest the practical implementation of such spectral analysis by varying the initial transform-limited laser pulse duration.

AB - We demonstrate that the two basic physical mechanisms of terahertz (THz) generation in a femtosecond filament, namely, the free electron photocurrent and the nonlinear polarization of neutrals, can be identified through the spectral analysis of THz radiation. The contribution from the photocurrent peaks at the units of THz, while the neutrals yield the peak at the tens of THz. We suggest the practical implementation of such spectral analysis by varying the initial transform-limited laser pulse duration.

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Transformation of terahertz spectra emitted from dual-frequency femtosecond pulse interaction in gases

Abstract

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