US 11,927,780 B2
Dielectric grating apparatus
Jian-Hung Lin, Taoyuan (TW); Chiang-Hsin Lin, Taoyuan (TW); Po-Tse Tai, Taoyuan (TW); Tsong-Dong Wang, Taoyuan (TW); and Bo-Kai Feng, Taoyuan (TW)
Assigned to NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Taoyuan (TW)
Filed by NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Taoyuan (TW)
Filed on May 31, 2022, as Appl. No. 17/828,057.
Prior Publication US 2023/0384493 A1, Nov. 30, 2023
Int. Cl. G02B 5/28 (2006.01); G02B 5/18 (2006.01)
CPC G02B 5/1809 (2013.01) [G02B 5/1857 (2013.01); G02B 5/285 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A dielectric grating apparatus, comprising:
a substrate;
a grating layer, disposed above the substrate;
a first interference layer, disposed above the substrate; and
a second interference layer, disposed above the substrate,
wherein the grating layer is contacted with the first interference layer directly, and the first interference layer is the same material as the grating layer,
wherein a refractive index of a material of the second interference layer is greater than a refractive index of a material of the first interference layer, and
wherein the first interference layer and the second interference layer are disposed in the grating layer.