This article is cited in 2 papers

Radiation scattering

Subdiffraction field localisation in the scattering of femtosecond laser radiation by a dielectric microsphere

Yu. E. Geints, A. A. Zemlyanov, E. K. Panina

Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Science, Tomsk

Abstract: The time dynamics of the optical field was theoretically considered in the near-field diffraction zone in the scattering of a femtosecond laser pulse by a transparent spherical microparticle. The spatial region of field focusing by the particle (the 'photonic jet' zone) was investigated; the evolution of the jet shape and the peak intensity in this region were analysed. For the first time it was determined that an extremely tight optical field localisation to a subdiffraction size is possible at a certain (resonance) temporal stage of photonic jet development.

Keywords: light scattering, microparticle, pulsed laser radiation, photonic jet, diffraction limit.

PACS: 42.25.Fx, 42.65.Re

Received: 16.06.2013
Revised: 02.10.2013

 English version: Quantum Electronics, 2014, 44:1, 48–53

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