Optical multiplexing and demultiplexing device, optical communication apparatus, and optical communication system

Abstract

The invention provides an optical multiplexing and demultiplexing device using a two-dimensional photonic crystal, in which miniaturization and higher integration thereof can be achieved; an optical communication apparatus; and an optical communication system. The optical multiplexing and demultiplexing device of the present invention includes a substrate; and a plurality of slab layers provided on the substrate. The slab layers each have a two-dimensional photonic crystal structure, in which low refractive index regions are periodically arranged. In addition, the slab layers have line defects, provided in part of the periodical arrangement so as to function as a waveguide, and at least point defects formed in the respective periodic arrangements, the point defects capturing light having a specific wavelength and introducing it to the line defects or capturing light having a specific wavelength from the line defects and radiating it. The point defects, which capture light having the same wavelength, provided in the slab layers are disposed so as to oppose each other.

Dependencies are inferred from the claim text.