Lithium niobate
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Amorphous lithium niobate (LiNbO3) films were deposited onto silicon substrates by the radiofrequency magnetron sputtering method in a pure Ar environment and an Ar þ O2 gas mixture with various oxygen contents. The oxide charge existing in as-grown films has two components: the positive Qox distributed in the bulk of a film and the negative Qox located at the film/substrate interface with a maximum magnitude corresponding to an Ar (80) O2 (20) gas mixture.
8p larachdumlanat129 14-01-2021 10 2 Download
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High temperature thermal treatment has been used to obtain atomically flat surfaces and to remove surface damage caused by mechanical polishing of as-received lithium niobate (LiNbO3) substrates. Annealing at 1000 ◦C for 2 hours produces optimal surface smoothness. The micro steps are nearly parallel and periodic almost all over the sample.
9p tamynhan8 04-11-2020 9 2 Download