| 摘要 |
The object is to provide an optical switch capable of efficient operation and a manufacturing method thereof. The optical switch according to the present invention is a Mach-Zehnder interferometer type optical switch composed of a line defect waveguide of a photonic crystal. Further, the optical switch according to the present invention includes two directional couplers 20 and 23, and two paths of waveguides 30 and 32 therebetween. Furthermore, between the two paths, group velocity of guided light differs in the first path waveguide 20 and the second path waveguide 32.
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