| 摘要 |
A guided mode resonance device, comprising—a substrate,—a waveguide,—a grating structure associated with said waveguide, said grating structure being arranged to an incident surface of said substrate, said incident surface being intended to receive an incident light beam provided by at least one light source, said incident light beam having an incident angle, defined relative to the normal of said waveguide, said grating structure comprising at least one elementary structure comprising at least a first-type grating structure and at least a second-type grating structure,—wherein:—said waveguide is arranged to transfer light from_the first-type grating structures to the second-type grating structure and also to transfer light from the second-type grating structures to the first-type grating structure,—said first-type grating structure is arranged to couple out a first light beam,—said second-type grating structure is arranged to couple out a second light beam,—said first light beam having a different spectral distribution than said second light beam. |
| 主权项 |
1. A guided mode resonance device, comprising
a substrate, defining a substrate plane, a thin-film waveguide, a sub-wavelength grating structure associated with said waveguide, said grating structure being arranged to an incident surface of said substrate, said incident surface being intended to receive an incident light beam provided by at least one light source, said incident light beam having an incident angle, defined relative to the normal of said waveguide, said grating structure comprising at least one elementary resonant grating structure comprising at least a first-type grating structure and at least a second-type grating structure, wherein:
said waveguide is arranged to transfer light from the first-type grating structure to the second-type grating structure and also to transfer light from the second-type grating structure to the first-type grating structure,said waveguide being made of a material of a refractive index at least 0.05 higher than the refractive index of the material adjacent to the side of the waveguide opposite to the incident surface,said first-type grating structure is arranged to incouple into said waveguide a first portion of said incident light beam,said second-type grating structure is arranged to incouple into said waveguide a second portion of said incident light beam,said first-type grating structure is arranged to couple out, of said waveguide, an outcoupled part of said second portion of said incident light beam, said outcoupled part defining a first light beam,said second-type grating structure is arranged to couple out, of said waveguide, an outcoupled part of said first portion of said incident light beam, said outcoupled part defining a second light beam,said first light beam and said second light beam having each an outcoupling angle, defined relative to the normal to the waveguide, said outcoupling angle being defined so that said first and second light beam is not symmetric, relative to the normal to the waveguide, to said incident light beam, and not parallel to said incident light beam,said first light beam having a different spectral distribution than said second light beam,said first-type grating structure and said second-type grating structure having different grating periods and/or a different grating orientation in said substrate plane. |
