Measurement method and apparatus of the photonic band structure of the photonic crystal waveguide

摘要

PROBLEM TO BE SOLVED: To exactly and simply measure a photonic band structure of a photonic crystal waveguide in a radiation mode and in a waveguide mode from the exterior while eliminating restriction on the crystal waveguide which is a measuring object.;SOLUTION: In this measurement method for the photonic band structure of the photonic crystal waveguide, a prism is disposed on a photonic crystal layer of the crystal waveguide so that the bottom part of the prism stands opposite thereto with a prescribed gap left by the crystal layer. In letting an incident beam through the prism into the crystal layer of the crystal waveguide, the incident beam is let into the bottom part of the prism at an incident angle equal to or more than a total reflection angle after entering the prism. The incident beam is totally reflected by the bottom part of the prism and let out from the prism as an outgoing beam, based on which the band structure is measured.;COPYRIGHT: (C)2007,JPO&INPIT