On the relative roles of higher-order nonlinearity and ionization in ultrafast light-matter interactions

J. M. Brown; E. M. Wright; J. V. Moloney; M. Kolesik

doi:10.1364/OL.37.001604

On the relative roles of higher-order nonlinearity and ionization in ultrafast light-matter interactions

J. M. Brown, E. M. Wright, J. V. Moloney, M. Kolesik

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

23 Scopus citations

Abstract

Far off-resonant ultrafast and nonlinear light-matter interactions are studied using a one-dimensional atomic model. Results from a pump-probe diagnostic reveal that any higher-order nonlinear refraction is masked by ionizationinduced defocusing before it becomes significant. On the other hand, we show that signatures of a higher-order nonlinearity may still be manifest via low-order harmonics of the pump center frequency. Implications for filamentation of femtosecond pulses are pointed out.

Original language	English (US)
Pages (from-to)	1604-1606
Number of pages	3
Journal	Optics letters
Volume	37
Issue number	10
DOIs	https://doi.org/10.1364/OL.37.001604
State	Published - May 15 2012

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OL.37.001604

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abstract = "Far off-resonant ultrafast and nonlinear light-matter interactions are studied using a one-dimensional atomic model. Results from a pump-probe diagnostic reveal that any higher-order nonlinear refraction is masked by ionizationinduced defocusing before it becomes significant. On the other hand, we show that signatures of a higher-order nonlinearity may still be manifest via low-order harmonics of the pump center frequency. Implications for filamentation of femtosecond pulses are pointed out.",

author = "Brown, {J. M.} and Wright, {E. M.} and Moloney, {J. V.} and M. Kolesik",

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AU - Brown, J. M.

AU - Wright, E. M.

AU - Moloney, J. V.

AU - Kolesik, M.

PY - 2012/5/15

Y1 - 2012/5/15

N2 - Far off-resonant ultrafast and nonlinear light-matter interactions are studied using a one-dimensional atomic model. Results from a pump-probe diagnostic reveal that any higher-order nonlinear refraction is masked by ionizationinduced defocusing before it becomes significant. On the other hand, we show that signatures of a higher-order nonlinearity may still be manifest via low-order harmonics of the pump center frequency. Implications for filamentation of femtosecond pulses are pointed out.

AB - Far off-resonant ultrafast and nonlinear light-matter interactions are studied using a one-dimensional atomic model. Results from a pump-probe diagnostic reveal that any higher-order nonlinear refraction is masked by ionizationinduced defocusing before it becomes significant. On the other hand, we show that signatures of a higher-order nonlinearity may still be manifest via low-order harmonics of the pump center frequency. Implications for filamentation of femtosecond pulses are pointed out.

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On the relative roles of higher-order nonlinearity and ionization in ultrafast light-matter interactions

Abstract

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