Patent ID: 7031566
Filing Date: 2006-04-18
Classification: B82Y,G02B,G03F

Abstract:
1. An optical spectral filter for spectral filtering of light at green and shorter wavelengths, comprising a substrate or host wafer having an array of substantially uniform parallel hollow pores therethrough, the pores having a characteristic lateral dimension in the plane of the host wafer within the range of from about 0.1 μm to about 20 μm, each pore supporting at least one waveguide mode in the transparency wavelength range of said filter, said wafer having first and second surfaces substantially perpendicular to the axis of the pores, and wherein the walls of each pore are coated with at least one layer of substantially transparent material at the transparency wavelength range of said filter and wherein the thickness of each of said layers of transparent material is at least 10 nm.