Meta-hybrid IR cut filter for image sensor

We proposed a meta-hybrid infrared (IR) cut filter consisting of metal/dielectric/metal nanodisks covered by a pigment layer. Compared to a conventional pigment-based IR cut filter, the meta-hybrid IR cut filter dramatically reduces the thickness requirement from 1000 to 425 nm. In our design, the simulated blocking factor of the meta-hybrid IR cut filter achieved 28.1. The measured blocking factor is 13.4, which is due to the oxidation of metal in nanodisks. Nevertheless, the measured blocking factor is still three times higher than a pigment layer under the same thickness. We believe the proposed meta-hybrid IR cut filter can be applied to high-resolution imaging sensors.