公开(公告)号：US20210191021A1

公开(公告)日：2021-06-24

申请号：US17005304

申请日：2020-08-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Radwanul Hasan SIDDIQUE ,  MohammadSadegh FARAJI-DANA

IPC: G02B5/30 ,  H01L27/146

Abstract: A filter for an imaging device includes an array of phase-modulating nanostructures formed on a substrate. At least one phase-modulating nanostructure of the array of phase-modulating nanostructures changes a phase of incident light a predetermined amount based on a first width and a second width of the phase-modulating nanostructure in which the first width is perpendicular to the second width. In one embodiment, the filter focuses light incident on the filter towards a center a pixel of an image sensor at an image plane. In another embodiment, the phase-modulating nanostructure is formed from a material having a refractive index that is greater than 1.9. The filter can also be used to form a quarter-wave plate.