Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation

Abstract Powerful, broadband terahertz (THz) pulses and its application attract an exponential growth of interests. Dual-color laser filamentation in gases is one of the promising THz sources because of the scalability of the THz energy and wavelength with input parameters. But the additional phase...

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Autores principales:	Chen Gong, Iwao Kawayama, Hironaru Murakami, Takahiro Teramoto, Masayoshi Tonouchi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b105f715eb064a95b238184da0498d02
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spelling	oai:doaj.org-article:b105f715eb064a95b238184da0498d022021-12-02T15:23:03ZIntensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation10.1038/s41598-020-80105-72045-2322https://doaj.org/article/b105f715eb064a95b238184da0498d022021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80105-7https://doaj.org/toc/2045-2322Abstract Powerful, broadband terahertz (THz) pulses and its application attract an exponential growth of interests. Dual-color laser filamentation in gases is one of the promising THz sources because of the scalability of the THz energy and wavelength with input parameters. But the additional phase induced by the nonlinearities associated with high intensities cannot be neglected because it may result in modulation of the THz waves. We investigate the influences of the infrared pump energy and air dispersion on the terahertz generation in dual-color laser filament. We observe that optimum dual-color laser relative phase of the THz generation undergoes a linear shift with increasing pump energy due to the intensity-induced refractive index change. This phase shift is verified by the spectral broadening of a two-color laser affected by the same mechanism. The result improves our understanding of the theoretical framework for a higher power THz source.Chen GongIwao KawayamaHironaru MurakamiTakahiro TeramotoMasayoshi TonouchiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chen Gong Iwao Kawayama Hironaru Murakami Takahiro Teramoto Masayoshi Tonouchi Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
description	Abstract Powerful, broadband terahertz (THz) pulses and its application attract an exponential growth of interests. Dual-color laser filamentation in gases is one of the promising THz sources because of the scalability of the THz energy and wavelength with input parameters. But the additional phase induced by the nonlinearities associated with high intensities cannot be neglected because it may result in modulation of the THz waves. We investigate the influences of the infrared pump energy and air dispersion on the terahertz generation in dual-color laser filament. We observe that optimum dual-color laser relative phase of the THz generation undergoes a linear shift with increasing pump energy due to the intensity-induced refractive index change. This phase shift is verified by the spectral broadening of a two-color laser affected by the same mechanism. The result improves our understanding of the theoretical framework for a higher power THz source.
format	article
author	Chen Gong Iwao Kawayama Hironaru Murakami Takahiro Teramoto Masayoshi Tonouchi
author_facet	Chen Gong Iwao Kawayama Hironaru Murakami Takahiro Teramoto Masayoshi Tonouchi
author_sort	Chen Gong
title	Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
title_short	Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
title_full	Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
title_fullStr	Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
title_full_unstemmed	Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
title_sort	intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b105f715eb064a95b238184da0498d02
work_keys_str_mv	AT chengong intensitydependentselfinduceddualcolorlaserphasemodulationanditseffectonterahertzgeneration AT iwaokawayama intensitydependentselfinduceddualcolorlaserphasemodulationanditseffectonterahertzgeneration AT hironarumurakami intensitydependentselfinduceddualcolorlaserphasemodulationanditseffectonterahertzgeneration AT takahiroteramoto intensitydependentselfinduceddualcolorlaserphasemodulationanditseffectonterahertzgeneration AT masayoshitonouchi intensitydependentselfinduceddualcolorlaserphasemodulationanditseffectonterahertzgeneration
_version_	1718387348830420992

Intensity-dependent self-induced dual-color laser phase modulation and its effect on terahertz generation

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