Comparative analysis of key parameters of "photonic nanojets" from axisymmetric nonspherical microparticles

Yurii E. Geints; Ekaterina K. Panina; Alexander A. Zemlyanov

doi:10.1117/12.2503311

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13 December 2018 Comparative analysis of key parameters of "photonic nanojets" from axisymmetric nonspherical microparticles

Yurii E. Geints, Ekaterina K. Panina, Alexander A. Zemlyanov

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Proceedings Volume 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1083312 (2018) https://doi.org/10.1117/12.2503311
Event: XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2018, Tomsk, Russian Federation

Abstract

The effect of "photonic nanojet" (PNJ) arising in the near-field scattering region at the surface of dielectric axisymmetric microparticles (hemisphere, axicon, combined particles) under optical illumination is considered theoretically. Numerical calculations of PNJ key parameters (length, width, peak intensity) were performed using the method of discrete-dipole approximation; the dependence of jet’s key parameters on the geometric shape of the microparticles is analyzed. We show that using a special type of combined transparent particles consisting of an axicon and two attached hemispheres, ultra-localized light fluxes with a peak intensity considerably exceeding the corresponding values for particles of simple shapes (hemisphere, axicon) can be realized.

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Yurii E. Geints, Ekaterina K. Panina, and Alexander A. Zemlyanov "Comparative analysis of key parameters of "photonic nanojets" from axisymmetric nonspherical microparticles", Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1083312 (13 December 2018); https://doi.org/10.1117/12.2503311

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