Broadband, selectively-absorptive wire grid polarizer

摘要

The invention includes a selectively-absorptive wire grid polarizer (WGP) comprising an array of parallel, elongated rods located over a surface of a transparent substrate with gaps between adjacent rods. Each of the rods can include a reflective wire and two absorptive ribs. The reflective wire can be sandwiched between the two absorptive ribs and the substrate or the two absorptive ribs can be sandwiched between the reflective wire and the substrate. Each of the two absorptive ribs can comprise a different material. Use of multiple absorptive ribs within each rod can increase the effective useful bandwidth of light for selectively absorbing one polarization.

主权项

1. A broadband, selectively-absorptive wire grid polarizer (WGP) comprising an array of parallel, elongated rods located over a surface of a transparent substrate with gaps between adjacent rods, each of the rods including a reflective wire and two absorptive ribs, wherein:
a. the reflective wire is sandwiched between the two absorptive ribs and the substrate or the two absorptive ribs are sandwiched between the reflective wire and the substrate; b. each of the two absorptive ribs comprises a different material; c. the two absorptive ribs include a first absorptive rib having a first material with a first thickness and a second absorptive rib having a second material with a second thickness; d. the first material with the first thickness has a wavelength (λ1) with a minimum reflectivity of light; e. the second material with the second thickness has a wavelength (λ2) with a minimum reflectivity of light; and f. 50 nanometers<|λ1−λ2|.