Patent ID: 8149073
Filing Date: 2012-04-03
Classification: B33Y,H01P

Abstract:
1. A band-pass filter comprising: a photonic crystal having a local mode that generates a pass band in a stop band formed by Bragg reflection, the photonic crystal including: a periodic structure including a low permittivity dielectric member and a plurality of high permittivity dielectric members periodically arranged in the low permittivity dielectric member so that said Bragg reflection occurs in the periodic structure, and a magnetic member disposed in the periodic structure; the local mode of electromagnetic waves propagating in the photonic crystal are limited by a transmission channel such that an amplitude direction of an electrical field is a first direction a magnetic field-applying unit for applying to the photonic crystal a DC magnetic field in a direction perpendicular to the propagation direction of the electromagnetic waves, wherein an electrical length inside the magnetic member is about ½ wavelength at a frequency within the pass band.