| 摘要 |
PURPOSE:To lessen the radiation due to the curve of a waveguide and provide a curved wavguide with low electromagnetic wave loss attributed to the radiation by forming the cross-section shape of the edge of the wave guiding part into a tilting shape or a shape projected outward. CONSTITUTION:A wave guiding part 12A having a reversely conical trapezoid shape as a cross-section shape, that is the shape as a whole, is formed on a substrate 11. The wave guiding part 12A is a part to introduce or transmit excited electromagnetic wave (light) and the substrate 11 is a part to become a clad region to the wave guiding part 12A and has a smaller reflective index than the wave guiding part 12A. An upper clad region 13A is so formed on the upper part of the substrate 11 and the wave guiding part 12A as to cover the wave guiding part 12A. The upper clad region 13A may be an air layer, a gas layer, or a vacuum layer. The cross-section shape of the edge of the wave guiding part 12A may be formed into a mountain shape projected outward. |
