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Article

Improvement on Thermal Stability of Nano-Domains in Lithium Niobate Thin Films

The MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics and TEDA Applied Physics Institute, Nankai University, Tianjin 300457, China
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Crystals 2020, 10(2), 74; https://doi.org/10.3390/cryst10020074
Received: 23 December 2019 / Revised: 17 January 2020 / Accepted: 22 January 2020 / Published: 30 January 2020
(This article belongs to the Special Issue Recent Progress in Lithium Niobate)
We present a simple and effective way to improve the thermal stability of nano-domains written with an atomic force microscope (AFM)-tip voltage in a lithium niobate film on insulator (LNOI). We show that nano-domains in LNOI (whether in the form of stripe domains or dot domains) degraded, or even disappeared, after a post-poling thermal annealing treatment at a temperature on the order of ∼100 C. We experimentally confirmed that the thermal stability of nano-domains in LNOI is greatly improved if a pre-heat treatment is carried out for LNOI before the nano-domains are written. This thermal stability improvement of nano-domains is mainly attributed to the generation of a compensating space charge field parallel to the spontaneous polarization of written nano-domains during the pre-heat treatment process. View Full-Text
Keywords: thermal stability; nano-domain; LNOI; pre-heat treatment thermal stability; nano-domain; LNOI; pre-heat treatment
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MDPI and ACS Style

Jiao, Y.; Shao, Z.; Li, S.; Wang, X.; Bo, F.; Xu, J.; Zhang, G. Improvement on Thermal Stability of Nano-Domains in Lithium Niobate Thin Films. Crystals 2020, 10, 74. https://doi.org/10.3390/cryst10020074

AMA Style

Jiao Y, Shao Z, Li S, Wang X, Bo F, Xu J, Zhang G. Improvement on Thermal Stability of Nano-Domains in Lithium Niobate Thin Films. Crystals. 2020; 10(2):74. https://doi.org/10.3390/cryst10020074

Chicago/Turabian Style

Jiao, Yuejian, Zhen Shao, Sanbing Li, Xiaojie Wang, Fang Bo, Jingjun Xu, and Guoquan Zhang. 2020. "Improvement on Thermal Stability of Nano-Domains in Lithium Niobate Thin Films" Crystals 10, no. 2: 74. https://doi.org/10.3390/cryst10020074

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