Abstract
Photonic nanojet (PNJ) phenomenon arising near transparent dielectric microparticles subject to plane wave illumination in the visible is considered. The near-field light scattering patterns produced by shaped wavelength-sized particles (hexahedron, cuboid, sphere, hemisphere, axicon, assembled particles) are numerically simulated and key PNJ parameters are analyzed. Particle shape influence on the peak intensity and spatial resolution of produced PNJ is investigated. We demonstrate that due to the reciprocal action of spherical-type and conical-type focusing of the special type of composite particles constituted of a hemisphere and an axicon can produce highly localized PNJ with peak intensity considerable higher than that for isolated regular particle (sphere, microaxicon, hemisphere).
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The research of the first (YEG), second (IVM) and fifth (OVM) co-authors were supported in part by the grant of “The Tomsk State University Academic D.I. Mendeleev Fund Program.”
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Geints, Y.E., Minin, I.V., Panina, E.K. et al. Comparison of photonic nanojets key parameters produced by nonspherical microparticles. Opt Quant Electron 49, 118 (2017). https://doi.org/10.1007/s11082-017-0958-y
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DOI: https://doi.org/10.1007/s11082-017-0958-y