MAGNETIC PHOTONIC CRYSTAL AND MAGNETOOPTIC IMAGING DEVICE, OPTO-MAGNETIC RECORDING MEDIUM, ARITHMETIC ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a multi-cavity magnetic photonic crystal and a magnetooptic imaging device which measure three-dimensional information of a magnetic field.SOLUTION: Attention is focused on the generation of different leakage magnetic field distributions, and a leakage magnetic field distribution generated from a target portion is obtained in positions each having a liftoff from an analyte different in some μm scale. A multi-cavity magnetic photonic crystal to be used comprises: a plurality of magnetic material layers laminated with appropriate intervals in an optical axis direction of irradiation light; and a plurality of dielectric layers laminated with the magnetic material layers interposed therebetween. The appropriate intervals are maintained by the dielectric layers laminated between the adjacent magnetic material layers. The use of matrix approach method allows light localization of design wavelength within the crystal and an increase of Faraday rotation angle, thus detecting a state in a depth direction by only shifting the wavelength.