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Growth of epitaxial LiNbO3 films on sapphire substrates and their nonlinear optical properties

Title
Growth of epitaxial LiNbO3 films on sapphire substrates and their nonlinear optical properties
Authors
Noh, TWLee, SHKim, DWOh, SMLim, MJLee, SDHan, SHWu, JW
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
1998
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN
0374-4884JCR Link
Citation
vol. 32, pp. S1307 - S1310
Publisher
KOREAN PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
Abstract
Epitaxial LiNbO3 films, i.e., LiNbO3(0001)/Al2O3(0001), LiNbO3(0001)/Al2O3(11 (2) under bar 0), and LiNbO3(11 (2) under bar 0)/Al2O3(11 (2) under bar 0) films, were grown by the pulsed laser deposition. By varying the growth conditions, it was possible to control various growth behaviors, i.e., twin-ratios and crystal orientations. The nonlinear optical properties of the films including the second harmonic generation (SHG) and electro-optic (EO) properties were investigated. The SHG patterns of LiNbO3(0001)/Al2O3 (0001) films were strongly dependent on their twin-ratios. In order to analyze them, the contributions of the structural twins and polarization domains were taken into account. The linear EO property of the LiNbO3(0001)/Al2O3(0001) film was found to be as good as that of single cystal. However, the LiNbO3(11 (2) under bar 0)/Al2O3(11 (2) under bar 0) film shows a very large quadratic EO behavior with an effective coefficient of 2.38x10(-15) m(2)/V-2.
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자연과학대학 > 물리학전공 > Journal papers
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