Optical element
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United States of America Patent
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May 31, 2022
Grant Date -
Jan 28, 2021
app pub date -
Feb 27, 2019
filing date -
Mar 29, 2018
priority date (Note) -
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Abstract
To provide an optical element in which an electrode is directly formed on an LN substrate, and a drift phenomenon is suppressed. In an optical element including: a substrate made of lithium niobate crystals; and an electrode disposed on the substrate, the substrate and the electrode are in direct contact with each other, and as a contact metal disposed on a surface of the electrode where the electrode is in contact with the substrate, a metal material whose standard enthalpy of formation per coordinate bond upon oxidation is greater than a standard enthalpy of formation per coordinate bond of niobium pentoxide is used.
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