Broadband graphene-based optical limiter for the protection of backside illuminated CMOS detectors

摘要

An optical device may include a sacrificial limiter filter including at least one layer of graphene disposed on a substrate. The at least one layer of graphene may be configured to absorb and scatter at least a portion of electromagnetic radiation incident on the at least one layer of graphene.

主权项

1. An optical device that is operative in response to electromagnetic radiation in a predefined spectral range and disabled in response to laser radiation exceeding a predefined damage threshold, the optical device comprising:
a substrate; and a sacrificial limiter filter configured to be destroyed by the laser radiation exceeding the predefined damage threshold, the sacrificial limiter filter including a first layer of graphene disposed on the substrate, a second layer of graphene, and a layer of dielectric material sandwiched between the first and second layers of graphene, the first and the second layers of graphene configured to absorb and scatter at least a portion of electromagnetic radiation incident on the layers of graphene.