Image of Veselago lens based upon two-dimensional photonic crystal with triangular lattice

TL;DR

This paper proposes a multi-focal Veselago lens using a uniaxial photonic crystal with a triangular lattice, demonstrating wave guiding properties and an image resolution of half the wavelength.

Contribution

It introduces a novel design for a Veselago lens based on a 2D photonic crystal with specific lattice parameters, expanding potential applications in optical imaging.

Findings

Lens achieves half-wavelength image width.

Wave guiding properties depend on substrate material.

Does not achieve superlensing but provides multi-focal imaging.

Abstract

The construction of the multi-focal Veselago lens predicted earlier is proposed on the basis of a uniaxial photonic crystal consisting of cylindrical air holes in silicon that make a triangular lattice in a plane perpendicular to the axis of the crystal. The object and image are in air. The period of the crystal should be $0.44\mu{\rm m}$ to work at the wavelength $1.5\mu{\rm m}$. The lens does not provide superlensing but the half-width of the image is $0.5\lambda$. The lens is shown to have wave guiding properties depending on the substrate material.