Patent ID: 11973154
Assignee: WAYMO LLC
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A device comprising:
a substrate; and
a photodetector coupled to the substrate,
wherein the photodetector is arranged to detect light emitted from a light source that irradiates a top surface of the device; and
an anti-reflective layer coupled to a second surface of the substrate,
wherein the anti-reflective layer is configured to couple light passing through the substrate to an exterior of the device, thereby preventing reflections within the substrate of the light emitted from the light source so as to reduce minority carrier photoexcitation in the substrate based on the light emitted from the light source, so as to mitigate dark current arising from minority carriers photoexcited in the substrate based on the light emitted from the light source.