| abstract |
(57) [Abstract] [Purpose] The shape of the waveguide can be controlled with high accuracy, the characteristics are stable, and the guided light can be strongly confined in the width direction, which is suitable for miniaturization and integration. (EN) Provided is a waveguide type optical control element capable of obtaining a large change in refractive index with voltage. [Structure] A high refractive index layer 2 formed on a substrate 1 and having a higher refractive index than the substrate 1, and a groove 4 provided in the high refractive index layer 2 and defining an optical waveguide 3 are provided. A conductor is embedded in this groove to form an electrode, and a voltage is applied to this electrode to branch / merge or modulate the guided light. |