Patent ID: 8600204
Filing Date: 2013-12-03
Classification: B82Y,G02B,G02F

Abstract:
1. An optical control device including a plurality of line-defect waveguides provided in a photonic crystal; each line-defect waveguide including a multiplicity of dielectric pillars with a finite height arranged at lattice points of a two-dimensional Bravais lattice; said optical control device comprising: a first line-defect waveguide; a second line-defect waveguide provided with the dielectric pillars that have lattice point intervals (that is, local lattice constants) different from those of the dielectric pillars of said first line-defect waveguide; and a third line-defect waveguide arranged between said first and second line-defect waveguides and provided with dielectric pillars whose lattice point intervals are gradually varied from the those of the dielectric pillars of said first line-defect waveguide to the those of the dielectric pillars of said second line-defect waveguide in the course from said first line-defect waveguide towards said second line-defect waveguide, along the wave guiding direction.