铌酸锂晶体铁电畴调控及器件应用研究进展

doi:10.19964/j.issn.1006-4990.2023-0473

Abstract

Abstract:

Lithium niobate is a multifunctional crystal with physical properties such as piezoelectric，ferroelectric，pyroelectric，electro-optical，acousto-optical，photoelastic，nonlinear and so on.With the continuous progress of lithium niobate iron domain engineering and the development of lithium niobate single crystal thin film technology，more excellent properties of lithium niobate have been developed，which are widely used in optical waveguides，electro-optical modulators，nonlinear optics，quantum devices and other fields.Future widespread applications in photonics may form the era of “lithium niobate valley”.The domain inversion method，growth mechanism，domain structure characterization method，application of ferroelectric domain engineering，and the latest research progress of lithium niobate thin-film devices such as optical waveguides，electro-optical devices，and quantum devices were emphatically introduced.With the transformation of lithium niobate from “bulk” to "thin film"，combined with micromachining technology，the application field of lithium niobate changed from independent devices to small multi-device integrated chips，and lithium ferroelectric domain engineering of lithium niobate would play a more important role in the process of building small fully integrated chips.

Key words: lithium niobate, ferroelectric, domain inversion, electro-optical application, quantum device

CLC Number:

TQ138.11

CHEN Yuneng, CHEN Kunfeng, XUE Dongfeng. Research progress of preparation and device application of lithium niobate crystal ferroelectric domain[J]. Inorganic Chemicals Industry, 2024, 56(6): 1-13.

Figures/Tables 15

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类型	典型值/特性
晶体结构	三方
折射率	n₀/n_e：2.341/2.254 7@500 nm
透明窗口	400~5 000 nm
带隙	4.71 eV
电光系数	r₁₃=9.6 pm/V；r₂₂=6.8 pm/V；r₃₃=30.9 pm/V；r₄₂=32.6 pm/V
二阶非线性系数	d₂₂（1.058 μm）=（2.46±0.23） pm/V；d₃₁（1.058 μm）=（-4.64±0.66） pm/V；d₃₃（1.058 μm）=（-41.7± 7.8） pm/V
三阶非线性系数	χ^（3）=（0.61±0.092）×10⁴ pm²/V²@1.047 μm
光弹常数	P₁₁=-0.026；P₁₂=0.090；P₁₃=0.133；P₁₄=-0.075；P₃₁=0.179；P₃₃=0.071；P₄₁=-0.151；P₄₄=0.146（无量纲）
热释电系数	-4×10^-9 C/（cm²·℃）、25 ℃
热导率	5.234 W/（m·K）（以a轴或c轴为取向）
热光系数	2.5×10^-6 K^-1（337 K，1 523 nm，寻常光）
热光系数	4×10^-5 K^-1（337 K，1 523 nm，非寻常光）
压电系数	d₁₅=6.8×10^-11 C/N；d₂₂=2.1×10^-11 C/N；d₃₁=-0.1 C/N；d₃₃=0.6 C/N

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Research progress of preparation and device application of lithium niobate crystal ferroelectric domain

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