Photonic Lenses with Whispering Gallery Waves at Janus Particles

Abstract

We show that electric field on the plane surface of truncated sphere or cylinders (so called Janus particles) have sharp resonances versus the depth of removed segment of a sphere or cylinder. These resonances are related to the excited whispering gallery waves caused by truncation. It is a new mechanism of the field localization. Optimization of this effect for cylinders permits to reach a super resolution in the line thickness what can be used for contacting optical lithography.

12 pages

References in corpus (4)

• High-Q supercavity modes in subwavelength dielectric resonators
• Axially symmetric focusing as a cuspoid diffraction catastrophe: Scalar and vector cases and comparison with the theory of Mie
• Super-enhancement focusing of Teflon sphere
• Super-resonances in microspheres: extreme effects in field localization

Cited by in corpus (1)

• Magnetic hot-spots generation at optical frequencies in all-dielectric mesoscale Janus particles