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Open AccessJournal ArticleDOI

Refractive index less than two: photonic nanojets yesterday, today and tomorrow [Invited]

TLDR
In this article, the authors present some of the phenomena and possible applications arising from the interaction of light with particles with a refractive index less than 2, and draw an overview of the possible applications of such materials, in connection with field enhancement and super resolution nanoscopy.
Abstract
Materials with relatively small refractive indices (n<2), such as glass, quartz, polymers, some ceramics, etc., are the basic materials in most optical components (lenses, optical fibres, etc.). In this review, we present some of the phenomena and possible applications arising from the interaction of light with particles with a refractive index less than 2. The vast majority of the physics involved can be described with the help of the exact, analytical solution of Maxwell’s equations for spherical particles (so called Mie theory). We also discuss some other particle geometries (spheroidal, cubic, etc.) and different particle configurations (isolated or interacting) and draw an overview of the possible applications of such materials, in connection with field enhancement and super resolution nanoscopy.

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Citations
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Journal ArticleDOI

Planar Diffractive Lenses: Fundamentals, Functionalities, and Applications.

TL;DR: The recent advances in planar diffractive lenses (PDLs) are reviewed from a united theoretical account on diffraction-based focusing optics, and the underlying physics of nanofocusing via constructive or destructive interference is revealed.
Journal ArticleDOI

Photonic hook: a new curved light beam

TL;DR: The photonic hook as discussed by the authors is a curved high-intensity focus by a dielectric trapezoid particle illuminated by a plane wave, which bends due to the difference between the phase velocity and the interference of the waves inside the particle.
References
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Journal ArticleDOI

Negative Refraction Makes a Perfect Lens

TL;DR: The authors' simulations show that a version of the lens operating at the frequency of visible light can be realized in the form of a thin slab of silver, which resolves objects only a few nanometers across.
Journal ArticleDOI

Electromagnetic Diffraction in Optical Systems. II. Structure of the Image Field in an Aplanatic System

TL;DR: In this article, an investigation of the structure of the electromagnetic field near the focus of an aplanatic system which images a point source is made, and the results are illustrated by diagrams and in a tabulated form based on data obtained by extensive calculations on an electronic computor.
Journal ArticleDOI

Optically resonant dielectric nanostructures

TL;DR: How high-index dielectric nanoparticles can offer a substitute for plasmonic nanoparticle structures, providing a highly flexible and low-loss route to the manipulation of light at the nanoscale is reviewed.
Journal ArticleDOI

Breaking the Diffraction Barrier: Optical Microscopy on a Nanometric Scale

TL;DR: A near-field probe has been developed that yields a resolution of ∼12 nm (∼λ/43) and signals ∼104- to 106-fold larger than those reported previously and image contrast is demonstrated to be highly polarization dependent.
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