Design and performance enhancement of an all-optical demultiplexer for optical computing applications employing photonic crystals.

In this paper, a photonic crystal (PhC) based 1×2 demultiplexer is designed to work efficiently at 1550 , which is the operating wavelength of optical communication. In designing a 1×2 demultiplexer, the PhC structure employs Y-shaped square-lattice silicon rods with air as its basis in accordance with the principle of beam interference. This study presents a 15×15 rod-based PhC optimized structure with air as its background.