19 May 1998 Instability of a high-power laser field in low-Q dielectric microsphere
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A theoretical model to describe localization of high-power electromagnetic field and abrupt local increasing of its amplitude in transparent nonabsorbing dielectric is presented. It is based on formation of unstable field structure in dielectric microstructures. Possibility for field instability to arise is estimated making use of model of diffraction of high-amplitude plane wave on sphere and cylinder which radii are about radiation wavelength. Field instability is shown to be threshold-like phenomenon. There are estimated threshold amplitude of incident wave and field amplification in the microsphere and cylinder. Possible laser-induced processes in transparent dielectric are discussed.
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Mikhail N. Libenson, Mikhail N. Libenson, Vitali E. Gruzdev, Vitali E. Gruzdev, Anastasia S. Gruzdeva, Anastasia S. Gruzdeva, "Instability of a high-power laser field in low-Q dielectric microsphere", Proc. SPIE 3263, Nonlinear Optical Engineering, (19 May 1998); doi: 10.1117/12.308351; https://doi.org/10.1117/12.308351

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