| 摘要 |
A disclosed optical deflection element includes a magnesia spinel film 22, a lower electrode 23, a lower cladding layer 24, a core layer 25, and an upper cladding layer 26, which are sequentially stacked formed on a silicon single crystal substrate 21. The magnesia spinel film 22, the lower electrode 23, a PLZT film acting as the lower cladding layer 24, and a PZT film acting as the core layer 25 are epitaxially grown on respective underlying layers thereof. Because of a voltage applied between the lower electrode 23 and the upper electrode 26, refractive index variable regions 25A, 24A, in which the refractive index varies, are formed due to the electro-optical effect. Light incident into the core layer 25 is deflected at the interface between the core layer 25 and the refractive index variable regions 25A, 24A to the inner side relative to the surface of the core layer 25. <IMAGE>
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