Publication Details
Abstract
Advanced plasmonic color filters for cutting-edge silicon complementary metal oxide semiconductor image sensors are the focus of this study, which also delves into the optical characteristics of plasmonic hole arrays. The aperture arrays are carefully engineered to function at the principal red, green, and blue colors; they consist of subwavelength-sized holes arranged in a hexagonal pattern on a 200 nm aluminum sheet. Transmission peaks may be seen in plasmonic filters with large hole arrays (>6 x 6 μm²) ranging from 40% to 60%. These filters continue to handle data for pixels as small as 1 × 1 μm², but they compromise transmission efficiency in the process. The filtering function of hole array filters is maintained even when random defects are present, and they are resilient to the spatial communication between pixels that are inside our detection limit. According to research on filter transmittance and crosstalk, the transmission properties of plasmonic hole array filters are mostly influenced by interactions between closest neighboring holes, rather than by long-range interactions. Additional evidence for this comes from a simple nearest neighbor model that, given a number of holes, reliably predicts the transmission efficiency of the hole array.