Thin film of lithium niobate single crystal
AssigneeIbiden Co., Ltd.
InventorSatoshi Ohno
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Abstract
This invention relates to a thin film of lithium niobate single crystal formed on a lithium tantalate substrate having a high electrooptical constant and a low propagation loss, which can be utilized in a thin-film wave-guiding second harmonic generating devices for converting the wavelength of an incident laser beam to a 1/2 level, characterized in that the lattice constant of the thin film of lithium niobate single crystal is matched with that of the lithium tantalate substrate.
Claims16
A thin film of lithium niobate single crystal formed on a (0001) surface of a lithium tantalate substrate wherein the thin film has an a-axis lattice constant in the range of 99.92 to 100.03% of the a-axis lattice constant of the lithium tantalate substrate, and the thin film is lattice matched with the substrate to thereby improve the optical properties of the thin film.
A thin film of lithium single crystal formed on the (0001) plan of a lithium tantalate substrate wherein the thin film contains sodium in an amount of 0.1 to 14.3 mole % and magnesium in an amount of 0.8 to 10.8 mole %, has an a-axis lattice constant in the range of 99.92 to 100.03% of the a-axis lattice constant of the lithium tantalate substrate, and the thin film is lattice matched with the lithium tantalate substrate to thereby improve the optical properties of the thin film.
Dependencies are inferred from the claim text.