Terahertz emission from laser-driven gas plasmas: A plasmonic point of view

I. Thiele; B. Zhou; A. Nguyen; E. Smetanina; R. Nuter; K. J. Kaltenecker; P. González De Alaiza Martínez; J. Déchard; L. Bergé; P.U. Jepsen; Stefan Skupin

doi:10.1364/OPTICA.5.001617

Terahertz emission from laser-driven gas plasmas: A plasmonic point of view

I. Thiele^*, B. Zhou, A. Nguyen, E. Smetanina, R. Nuter, K. J. Kaltenecker, P. González De Alaiza Martínez, J. Déchard, L. Bergé, P.U. Jepsen, Stefan Skupin

^*Corresponding author for this work

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Abstract

We disclose an unanticipated link between plasmonics and nonlinear frequency down-conversion in laser-induced gas-plasmas. For two-color femtosecond pump pulses, a plasmonic resonance is shown to broaden the terahertz emission spectra significantly. We identify the resonance as a leaky mode, which contributes to the emission spectra whenever electrons are excited along a direction where the plasma size is smaller than the plasma wavelength. As a direct consequence, such resonances can be controlled by changing the polarization properties of elliptically shaped driving laser pulses. Both experimental results and 3D Maxwell consistent simulations confirm that a significant terahertz pulse shortening and spectral broadening can be achieved by exploiting the transverse driving laser beam shape as an additional degree of freedom. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Original language	English
Journal	Optica
Volume	5
Issue number	12
Pages (from-to)	1617-1622
Number of pages	6
ISSN	2334-2536
DOIs	https://doi.org/10.1364/OPTICA.5.001617
Publication status	Published - 2018

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title = "Terahertz emission from laser-driven gas plasmas: A plasmonic point of view",

abstract = "We disclose an unanticipated link between plasmonics and nonlinear frequency down-conversion in laser-induced gas-plasmas. For two-color femtosecond pump pulses, a plasmonic resonance is shown to broaden the terahertz emission spectra significantly. We identify the resonance as a leaky mode, which contributes to the emission spectra whenever electrons are excited along a direction where the plasma size is smaller than the plasma wavelength. As a direct consequence, such resonances can be controlled by changing the polarization properties of elliptically shaped driving laser pulses. Both experimental results and 3D Maxwell consistent simulations confirm that a significant terahertz pulse shortening and spectral broadening can be achieved by exploiting the transverse driving laser beam shape as an additional degree of freedom. {\textcopyright} 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.",

author = "I. Thiele and B. Zhou and A. Nguyen and E. Smetanina and R. Nuter and Kaltenecker, {K. J.} and Mart{\'i}nez, {P. Gonz{\'a}lez De Alaiza} and J. D{\'e}chard and L. Berg{\'e} and P.U. Jepsen and Stefan Skupin",

note = "{\textcopyright} 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement",

year = "2018",

doi = "10.1364/OPTICA.5.001617",

language = "English",

volume = "5",

pages = "1617--1622",

journal = "Optica",

issn = "2334-2536",

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TY - JOUR

T1 - Terahertz emission from laser-driven gas plasmas: A plasmonic point of view

AU - Thiele, I.

AU - Zhou, B.

AU - Nguyen, A.

AU - Smetanina, E.

AU - Nuter, R.

AU - Kaltenecker, K. J.

AU - Martínez, P. González De Alaiza

AU - Déchard, J.

AU - Bergé, L.

AU - Jepsen, P.U.

AU - Skupin, Stefan

PY - 2018

Y1 - 2018

N2 - We disclose an unanticipated link between plasmonics and nonlinear frequency down-conversion in laser-induced gas-plasmas. For two-color femtosecond pump pulses, a plasmonic resonance is shown to broaden the terahertz emission spectra significantly. We identify the resonance as a leaky mode, which contributes to the emission spectra whenever electrons are excited along a direction where the plasma size is smaller than the plasma wavelength. As a direct consequence, such resonances can be controlled by changing the polarization properties of elliptically shaped driving laser pulses. Both experimental results and 3D Maxwell consistent simulations confirm that a significant terahertz pulse shortening and spectral broadening can be achieved by exploiting the transverse driving laser beam shape as an additional degree of freedom. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

AB - We disclose an unanticipated link between plasmonics and nonlinear frequency down-conversion in laser-induced gas-plasmas. For two-color femtosecond pump pulses, a plasmonic resonance is shown to broaden the terahertz emission spectra significantly. We identify the resonance as a leaky mode, which contributes to the emission spectra whenever electrons are excited along a direction where the plasma size is smaller than the plasma wavelength. As a direct consequence, such resonances can be controlled by changing the polarization properties of elliptically shaped driving laser pulses. Both experimental results and 3D Maxwell consistent simulations confirm that a significant terahertz pulse shortening and spectral broadening can be achieved by exploiting the transverse driving laser beam shape as an additional degree of freedom. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

U2 - 10.1364/OPTICA.5.001617

DO - 10.1364/OPTICA.5.001617

M3 - Journal article

VL - 5

SP - 1617

EP - 1622

JO - Optica

JF - Optica

SN - 2334-2536

IS - 12

ER -

Terahertz emission from laser-driven gas plasmas: A plasmonic point of view

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