Tuning the photonic nanojet based on the Babinet principle

Alina Karabchevsky; Yaakov Keren; Oleg V. Minin; Igor V. Minin

doi:10.1117/12.2556075

1 April 2020 Tuning the photonic nanojet based on the Babinet principle

Alina Karabchevsky, Yaakov Keren, Oleg V. Minin, Igor V. Minin

Proceedings Volume 11368, Photonics and Plasmonics at the Mesoscale; 1136806 (2020) https://doi.org/10.1117/12.2556075
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

The diffraction limit of electromagnetic waves restricts the formation of sub-wavelength spots. The feasibility to generate scattered beams of light with a high-intensity main lobe, a weak sub-diffracting waist, and a very low divergence angle, named Photonic nanojets, was demonstrated traditionally with spherical particles. Various practical applications require the creation of different types of photonic jets or electromagnetic streams with specific characteristics and properties. For instance, photonic jets can be applied to ease the coupling into the optical waveguides. In this case, photonic jets play the role of a coupling element similar to the lens, grating coupler or prism. To address this challenge, we study the Fresnel Zone Plate (FZP) of rings-like shape. We show that the Babinet principle can be applied for studying the complementary diffractive structures for the formation of near-field photonic jets on a facet of the optical waveguide. Using COMSOL Multiphysics, we built a model of the Fresnel Zone Plate structure based on rings and demonstrate the applicability of Babinet’s principle for the formation of photonic jets in the near-infrared.

Citation Download Citation

Alina Karabchevsky, Yaakov Keren, Oleg V. Minin, and Igor V. Minin "Tuning the photonic nanojet based on the Babinet principle", Proc. SPIE 11368, Photonics and Plasmonics at the Mesoscale, 1136806 (1 April 2020); https://doi.org/10.1117/12.2556075

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KEYWORDS

Lens design

Diffraction

Fresnel lenses

Photonic nanostructures

Super resolution

Near field optics

Near field

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