Negative refraction photonic crystal lens

Details Negative refraction photonic crystal lens Negative refraction photonic crystal lens

2011-01-04

2011-01-04

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

Selective wavelength transmitting or blocking

C359S642000, C385S129000

Reexamination Certificate

active

07864449

ABSTRACT:
A negative refraction photonic crystal lens is provided. The negative refraction photonic crystal lens includes a substrate and a plurality of voids periodically distributed in the substrate. The voids are configured extending along a direction longitudinally perpendicular with an incident direction of a light having a specific wavelength. By suitably selecting a refractive index of the substrate, a radius of the voids, and a lattice parameter of the voids, the negative refraction photonic crystal lens presents a negative refraction characteristic with respect to the specific wavelength, in that the light incident from one side of the substrate can be focused at the other side of the substrate, thus configuring an optical lens. The optical lens is adapted for not only achieving an optimal sub-wavelength focusing performance, but also further improving the imaging resolution of the negative refraction photonic crystal lens by employing an anisotropic material for preparing the substrate.

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