US 12,442,959 B2
Color-routers for image sensing
Nathan Zhao, Stanford, CA (US); Peter B. Catrysse, Redwood City, CA (US); and Shanhui Fan, Stanford, CA (US)
Assigned to The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US)
Appl. No. 18/030,126
Filed by The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US)
PCT Filed Nov. 2, 2021, PCT No. PCT/US2021/057693
§ 371(c)(1), (2) Date Apr. 4, 2023,
PCT Pub. No. WO2022/094453, PCT Pub. Date May 5, 2022.
Claims priority of provisional application 63/108,622, filed on Nov. 2, 2020.
Prior Publication US 2023/0417960 A1, Dec. 28, 2023
Int. Cl. G02B 5/02 (2006.01); G02B 5/20 (2006.01); G02B 27/00 (2006.01); G02B 27/10 (2006.01); H10F 39/00 (2025.01)
CPC G02B 5/0247 (2013.01) [G02B 5/201 (2013.01); G02B 27/0012 (2013.01); G02B 27/1013 (2013.01); H10F 39/8053 (2025.01); G02B 2207/101 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An image-sensor pixel-repeat unit (100) for detecting each of a plurality of wavelength signals (106B, 106G, 106R, and 106NIR) in a light signal (106) incident on the pixel-repeat unit, wherein the image-sensor pixel-repeat unit comprises:
a light-detection layer (102) comprising a plurality of photodetectors (110B, 110G, 110R, and 110NIR), the plurality of photodetectors being arranged in a first arrangement; and
a color router (104) disposed on the light-detection layer, the color router comprising a background medium throughout which a three-dimensional arrangement of a first plurality of nanoscale scatterers (408), wherein the first plurality of scatterers is arranged within the color router in a second arrangement (414), and wherein the color router comprises a first material (M1) having a first dielectric constant, and wherein each scatterer of the first plurality of scatterers comprising a second material (M2) having a second dielectric constant that is different than the first dielectric constant;
wherein the second arrangement is configured such that the plurality of wavelength signals is directly routed to the plurality of photodetectors such that each photodetector of the plurality of photodetectors selectively receives a different wavelength signal of the plurality of wavelength signals.