15 March 1999 Instability of a high-power electromagnetic field in nonabsorbing microinclusions in transparent dielectric materials
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Proceedings Volume 3734, ICONO '98: Fundamental Aspects of Laser-Matter Interaction and New Nonlinear Optical Materials and Physics of Low-Dimensional Structures; (1999) https://doi.org/10.1117/12.342352
Event: ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, 1998, Moscow, Russian Federation
Abstract
There is considered a model describing abrupt local increasing of electric-field amplitude in transparent dielectric due to light-induced resonances in nonabsorbing inclusion. It is based on idea of self-induced formation of unstable field structure in dielectric microinclusions due to nonlinear variations of refractive index. Obtained results show that small (its radius is about wavelength) transparent inclusion can cause large field amplification. Possibility for field instability to arise is estimated using model of scattering for high-power plane wave by dielectric sphere and cylinder which radius is about or less radiation wavelength. Field instability is shown to have threshold. Presented results of computer modeling of nonlinear evolution of high-power laser radiation in dielectric cylinder confirm the developed ideas.
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Vitali E. Gruzdev, Anastasia S. Gruzdeva, Mikhail N. Libenson, "Instability of a high-power electromagnetic field in nonabsorbing microinclusions in transparent dielectric materials", Proc. SPIE 3734, ICONO '98: Fundamental Aspects of Laser-Matter Interaction and New Nonlinear Optical Materials and Physics of Low-Dimensional Structures, (15 March 1999); doi: 10.1117/12.342352; https://doi.org/10.1117/12.342352
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