Structural and nonlinear optical properties of epitaxial LiNbO3 films grown by pulsed laser deposition

Dong Wook Kim; See Hyung Lee; T. W. Noh

doi:10.1016/S0921-5107(98)00240-2

Structural and nonlinear optical properties of epitaxial LiNbO₃ films grown by pulsed laser deposition

Dong Wook Kim, See Hyung Lee, T. W. Noh

Department of Physics

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Epitaxial LiNbO₃ films were grown on Al₂O₃ substrates using pulsed laser deposition. Formation of the Li-deficient phase could be suppressed by lowering deposition temperature. With a shadow mask, surface smoothness of the film was significantly improved and its propagation loss was reduced to 3 dB cm^-1. On Al₂O₃(0001) substrates, the films with different twin ratios could be grown by varying the growth conditions and their second harmonic generation (SHG) properties were investigated. In order to analyze the SHG patterns, the contributions of the structural twins and polarization domains were taken into account. The nonlinear optical susceptibilities and linear electro-optic (EO) coefficients of the LiNbO₃(0001)/Al₂O₃(0001) film were found to be comparable to those of single crystals. On Al₂O₃(1120) substrates, it was possible to obtain two kinds of films with different crystal orientations and their EO behaviors were found to be quite different. LiNbO₃(0001) films had negligible EO properties but LiNbO₃(1120) films showed a very large quadratic EO behavior with an effective coefficient of 2.38 × 10^-15 m² V^-2.

Original language	English
Pages (from-to)	251-255
Number of pages	5
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	56
Issue number	2-3
DOIs	https://doi.org/10.1016/S0921-5107(98)00240-2
State	Published - 6 Nov 1998

Bibliographical note

Funding Information:
We would like to express our sincere thanks to S.-D. Lee, J. W. Wu, MooJong Lim, and S. H. Han for their help and discussions. This work was financially supported by the Korean Science and Engineering Foundation through the RCDAMP at Pusan National University.

Keywords

Electro-optic
Films
LiNbO
Propagation loss
Pulsed laser deposition
Second harmonic generation

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10.1016/S0921-5107(98)00240-2

Cite this

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title = "Structural and nonlinear optical properties of epitaxial LiNbO3 films grown by pulsed laser deposition",

abstract = "Epitaxial LiNbO3 films were grown on Al2O3 substrates using pulsed laser deposition. Formation of the Li-deficient phase could be suppressed by lowering deposition temperature. With a shadow mask, surface smoothness of the film was significantly improved and its propagation loss was reduced to 3 dB cm-1. On Al2O3(0001) substrates, the films with different twin ratios could be grown by varying the growth conditions and their second harmonic generation (SHG) properties were investigated. In order to analyze the SHG patterns, the contributions of the structural twins and polarization domains were taken into account. The nonlinear optical susceptibilities and linear electro-optic (EO) coefficients of the LiNbO3(0001)/Al2O3(0001) film were found to be comparable to those of single crystals. On Al2O3(1120) substrates, it was possible to obtain two kinds of films with different crystal orientations and their EO behaviors were found to be quite different. LiNbO3(0001) films had negligible EO properties but LiNbO3(1120) films showed a very large quadratic EO behavior with an effective coefficient of 2.38 × 10-15 m2 V-2.",

keywords = "Electro-optic, Films, LiNbO, Propagation loss, Pulsed laser deposition, Second harmonic generation",

author = "Kim, {Dong Wook} and Lee, {See Hyung} and Noh, {T. W.}",

note = "Funding Information: We would like to express our sincere thanks to S.-D. Lee, J. W. Wu, MooJong Lim, and S. H. Han for their help and discussions. This work was financially supported by the Korean Science and Engineering Foundation through the RCDAMP at Pusan National University.",

year = "1998",

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doi = "10.1016/S0921-5107(98)00240-2",

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T1 - Structural and nonlinear optical properties of epitaxial LiNbO3 films grown by pulsed laser deposition

AU - Kim, Dong Wook

AU - Lee, See Hyung

AU - Noh, T. W.

N1 - Funding Information: We would like to express our sincere thanks to S.-D. Lee, J. W. Wu, MooJong Lim, and S. H. Han for their help and discussions. This work was financially supported by the Korean Science and Engineering Foundation through the RCDAMP at Pusan National University.

PY - 1998/11/6

Y1 - 1998/11/6

N2 - Epitaxial LiNbO3 films were grown on Al2O3 substrates using pulsed laser deposition. Formation of the Li-deficient phase could be suppressed by lowering deposition temperature. With a shadow mask, surface smoothness of the film was significantly improved and its propagation loss was reduced to 3 dB cm-1. On Al2O3(0001) substrates, the films with different twin ratios could be grown by varying the growth conditions and their second harmonic generation (SHG) properties were investigated. In order to analyze the SHG patterns, the contributions of the structural twins and polarization domains were taken into account. The nonlinear optical susceptibilities and linear electro-optic (EO) coefficients of the LiNbO3(0001)/Al2O3(0001) film were found to be comparable to those of single crystals. On Al2O3(1120) substrates, it was possible to obtain two kinds of films with different crystal orientations and their EO behaviors were found to be quite different. LiNbO3(0001) films had negligible EO properties but LiNbO3(1120) films showed a very large quadratic EO behavior with an effective coefficient of 2.38 × 10-15 m2 V-2.

AB - Epitaxial LiNbO3 films were grown on Al2O3 substrates using pulsed laser deposition. Formation of the Li-deficient phase could be suppressed by lowering deposition temperature. With a shadow mask, surface smoothness of the film was significantly improved and its propagation loss was reduced to 3 dB cm-1. On Al2O3(0001) substrates, the films with different twin ratios could be grown by varying the growth conditions and their second harmonic generation (SHG) properties were investigated. In order to analyze the SHG patterns, the contributions of the structural twins and polarization domains were taken into account. The nonlinear optical susceptibilities and linear electro-optic (EO) coefficients of the LiNbO3(0001)/Al2O3(0001) film were found to be comparable to those of single crystals. On Al2O3(1120) substrates, it was possible to obtain two kinds of films with different crystal orientations and their EO behaviors were found to be quite different. LiNbO3(0001) films had negligible EO properties but LiNbO3(1120) films showed a very large quadratic EO behavior with an effective coefficient of 2.38 × 10-15 m2 V-2.

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KW - Films

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KW - Propagation loss

KW - Pulsed laser deposition

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