Patent ID: 9720151
Date: 2017-08-01
CPC Classifications: G02B,G02F

Claim:
1. A structure for broadband light tunneling, comprising a two-dimensional periodic array of unit cells in a thin conducting film, wherein the unit cells have a first periodicity in a first dimension and a second periodicity in a second dimension, wherein the unit cells are ultrasubwavelength to an incident light normal to the two-dimensional periodic array, wherein each unit cell comprises a single aperture that is connected to an aperture in an adjacent unit cell in the first dimension but not in the second dimension, and wherein each aperture comprises a large sub-aperture that aids in coupling of the incident light and a small sub-aperture that funnels a significant fraction of the incident light power, and wherein the wavelength of the incident light is between 0.3 pm and 1000 pm, and wherein the thin conducting film has a thickness in a third dimension orthogonal to the first and second dimensions and wherein the thickness of the thin conducting film is subwavelength to the incident light, and wherein the apertures are unfilled.