US 12,136,678 B2
Non-rectangular germanium photodetector with angled input waveguide
Dries Vercruysse, Millbrae, CA (US); and John M. Fini, Albany, CA (US)
Assigned to Ayar Labs, Inc., San Jose, CA (US)
Filed by Ayar Labs, Inc., Santa Clara, CA (US)
Filed on Apr. 12, 2022, as Appl. No. 17/718,319.
Claims priority of provisional application 63/174,471, filed on Apr. 13, 2021.
Prior Publication US 2022/0328705 A1, Oct. 13, 2022
Int. Cl. H01L 31/0232 (2014.01); G02B 6/42 (2006.01); H01L 31/109 (2006.01)
CPC H01L 31/02327 (2013.01) [G02B 6/4203 (2013.01); H01L 31/109 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A photodetector, comprising:
a photodiode having a germanium junction formed between an n-doped region and a p-doped region, the germanium junction formed to have a light input interface, the light input interface having a convex-faceted shape, the germanium junction having a polygonal cross-sectional shape in a reference plane between the n-doped region and the p-doped region, the polygonal cross-sectional shape including at least one angle greater than ninety degrees.