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12 March 2001 Possibility of the formation of shock electromagnetic waves on optical cycle due to the generation of higher harmonics
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Abstract
There is considered formation and propagation of shock electromagnetic waves (SEW) of visible spectral range as possible nonlinear optical phenomenon taking place at laser intensities characteristic of femtosecond laser interaction with transparent solids. Main regularities of SHEW formation are studied on the basis of 1D model of plane-wave propagation in isotropic dielectric with nonlinear optical response. Special attention is paid to influence of color dispersion and absorption on SEW formation and propagation. Necessary conditions for appearing of SHEW are obtained, in particular, threshold amplitude is estimated. There is presented an model for numerical study of SHEW formation and propagation influenced by dispersion of linear and nonlinear pats of refractive index. Using the simulation, we studied dynamics of SHEW formation on several optical cycles near leading edge of femtosecond laser pulse propagating in transparent medium. Important observed features of SHEW are discussed.
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Vitali E. Gruzdev and Anastasia S. Gruzdeva "Possibility of the formation of shock electromagnetic waves on optical cycle due to the generation of higher harmonics", Proc. SPIE 4352, Laser Optics 2000: Ultrafast Optics and Superstrong Laser Fields, (12 March 2001); https://doi.org/10.1117/12.418787
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