Optical Color Filter Based on Surface Plasmon Resonance Using Corrugated Metallic Thin Film for Image Sensor

Abstract

The purpose of our study is the development of optical color filter having high color selectivity for image sensor. In order to achieve our purpose, we propose a new optical color filter of periodic corrugated metallic nano-structures based on surface plasmon resonance. By patterning the metal surface with a concentric periodic corrugation, light of the wavelength coupled with surface plasmons is transmitted as a beaming light through the sub-wavelength aperture. The beaming light transmission has an advantage to reduce the spatial color cross-talk in the conventional image sensor. We demonstrated the proposed corrugated metallic thin film filter had transmission color selectivity.