Extending the high-order harmonic generation cutoff by means of self-phase-modulated chirped pulses

E. Neyra; F. Videla; J. A. Pérez-Hernández; M. F. Ciappina; L. Roso; G. A. Torchia

doi:10.1088/1612-2011/13/11/115303

Extending the high-order harmonic generation cutoff by means of self-phase-modulated chirped pulses

E. Neyra, F. Videla, J. A. Pérez-Hernández, M. F. Ciappina, L. Roso, G. A. Torchia

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

13 Scopus citations

Abstract

In this letter we propose a complementary approach to extend the cutoff in high-order harmonic generation (HHG) spectra beyond the well established limits. Inspired by techniques normally used in the compression of ultrashort pulses and supercontinuum generation, we show this extension can be achieved by means of a nonlinear phenomenon known as self-phase-modulation (SPM). We demonstrated that relatively long optical pulses, around 100 fs full-width half maximum (FWHM), non linearly chirped by SPM, are able to produce a considerable extension in the HHG cutoff. We have also shown it is possible control this extension by setting the length of the nonlinear medium. Our study was supported by the numerical integration of the time-dependent Schrödinger equation joint with a complete classical analysis of the electron dynamic. Our approach can be considered as an alternative to the utilization of optical parametric amplification (OPA) and it can be easily implemented in usual facilities with femtosecond laser systems. This technique also preserves the harmonic yield in the zone of the plateau delimited by I _p + 3.17Up law, even when the driven pulses contain larger wavelength components.

Original language	English
Article number	115303
Journal	Laser Physics Letters
Volume	13
Issue number	11
DOIs	https://doi.org/10.1088/1612-2011/13/11/115303
State	Published - Nov 2016
Externally published	Yes

Keywords

chirped pulses
high harmonic generation (HHG)
self phase modulation (SPM)

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10.1088/1612-2011/13/11/115303

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title = "Extending the high-order harmonic generation cutoff by means of self-phase-modulated chirped pulses",

abstract = "In this letter we propose a complementary approach to extend the cutoff in high-order harmonic generation (HHG) spectra beyond the well established limits. Inspired by techniques normally used in the compression of ultrashort pulses and supercontinuum generation, we show this extension can be achieved by means of a nonlinear phenomenon known as self-phase-modulation (SPM). We demonstrated that relatively long optical pulses, around 100 fs full-width half maximum (FWHM), non linearly chirped by SPM, are able to produce a considerable extension in the HHG cutoff. We have also shown it is possible control this extension by setting the length of the nonlinear medium. Our study was supported by the numerical integration of the time-dependent Schr{\"o}dinger equation joint with a complete classical analysis of the electron dynamic. Our approach can be considered as an alternative to the utilization of optical parametric amplification (OPA) and it can be easily implemented in usual facilities with femtosecond laser systems. This technique also preserves the harmonic yield in the zone of the plateau delimited by I p + 3.17Up law, even when the driven pulses contain larger wavelength components.",

keywords = "chirped pulses, high harmonic generation (HHG), self phase modulation (SPM)",

author = "E. Neyra and F. Videla and P{\'e}rez-Hern{\'a}ndez, {J. A.} and Ciappina, {M. F.} and L. Roso and Torchia, {G. A.}",

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doi = "10.1088/1612-2011/13/11/115303",

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T1 - Extending the high-order harmonic generation cutoff by means of self-phase-modulated chirped pulses

AU - Neyra, E.

AU - Videla, F.

AU - Pérez-Hernández, J. A.

AU - Ciappina, M. F.

AU - Roso, L.

AU - Torchia, G. A.

PY - 2016/11

Y1 - 2016/11

N2 - In this letter we propose a complementary approach to extend the cutoff in high-order harmonic generation (HHG) spectra beyond the well established limits. Inspired by techniques normally used in the compression of ultrashort pulses and supercontinuum generation, we show this extension can be achieved by means of a nonlinear phenomenon known as self-phase-modulation (SPM). We demonstrated that relatively long optical pulses, around 100 fs full-width half maximum (FWHM), non linearly chirped by SPM, are able to produce a considerable extension in the HHG cutoff. We have also shown it is possible control this extension by setting the length of the nonlinear medium. Our study was supported by the numerical integration of the time-dependent Schrödinger equation joint with a complete classical analysis of the electron dynamic. Our approach can be considered as an alternative to the utilization of optical parametric amplification (OPA) and it can be easily implemented in usual facilities with femtosecond laser systems. This technique also preserves the harmonic yield in the zone of the plateau delimited by I p + 3.17Up law, even when the driven pulses contain larger wavelength components.

AB - In this letter we propose a complementary approach to extend the cutoff in high-order harmonic generation (HHG) spectra beyond the well established limits. Inspired by techniques normally used in the compression of ultrashort pulses and supercontinuum generation, we show this extension can be achieved by means of a nonlinear phenomenon known as self-phase-modulation (SPM). We demonstrated that relatively long optical pulses, around 100 fs full-width half maximum (FWHM), non linearly chirped by SPM, are able to produce a considerable extension in the HHG cutoff. We have also shown it is possible control this extension by setting the length of the nonlinear medium. Our study was supported by the numerical integration of the time-dependent Schrödinger equation joint with a complete classical analysis of the electron dynamic. Our approach can be considered as an alternative to the utilization of optical parametric amplification (OPA) and it can be easily implemented in usual facilities with femtosecond laser systems. This technique also preserves the harmonic yield in the zone of the plateau delimited by I p + 3.17Up law, even when the driven pulses contain larger wavelength components.

KW - chirped pulses

KW - high harmonic generation (HHG)

KW - self phase modulation (SPM)

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DO - 10.1088/1612-2011/13/11/115303

M3 - 文章

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VL - 13

JO - Laser Physics Letters

JF - Laser Physics Letters

IS - 11

M1 - 115303

ER -

Extending the high-order harmonic generation cutoff by means of self-phase-modulated chirped pulses

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Keywords

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