Instability of a high-power electromagnetic field in nonabsorbing microinclusions in transparent dielectric materials

Vitali E. Gruzdev; Anastasia S. Gruzdeva; Mikhail N. Libenson

doi:10.1117/12.342352

15 March 1999 Instability of a high-power electromagnetic field in nonabsorbing microinclusions in transparent dielectric materials

Vitali E. Gruzdev, Anastasia S. Gruzdeva, Mikhail N. Libenson

Author Affiliations +

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.

Citation Download Citation

Vitali E. Gruzdev, Anastasia S. Gruzdeva, and 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); https://doi.org/10.1117/12.342352

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KEYWORDS

Dielectrics

Refractive index

Laser induced damage

Refraction

Positive feedback

Electromagnetism

Laser development

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