Thin-Layer Optical Filter for Specific Areas of Visible Spectrum Based on 1D Photonic Crystal Structure

摘要

In this work design, simulation and fabrication of three thin-layer optical filter based on ID Photonic Crystals (PhCs) has been proposed. Each filter is suitable for a specific area of visible spectrum such as blue, green and red respectively. Each of three filters is placed on top of an imager sensor and is consists from seven layers of TiO_2 and SiO_2 materials. These layers are respectively deposited on a substrate matter using RF-sputtering. The substrate matter is an all-pass visible filter. The wavelengths of visible light spectrum that the human eye is more sensitive to them, can be extracted by these filters and then are focused on its own sensors. The Transfer Matrix Method (TMM) is used for computing of thickness of all layers and transmission factor of each filter. Results were proved by MATLAB simulation such that the central wavelength of the blue, green and red light filters would be 437 nm, 533 nm and 564 nm respectively.