Highly efficient broadband second harmonic generation using polydomain epitaxial barium titanate thin film waveguides

Pao Tai Lin; B. W. Wessels; Joon I. Jang; J. B. Ketterson

doi:10.1063/1.2936934

Highly efficient broadband second harmonic generation using polydomain epitaxial barium titanate thin film waveguides

Pao Tai Lin, B. W. Wessels, Joon I. Jang, J. B. Ketterson

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12 Scopus citations

Abstract

Broad band second harmonic generation (SHG) over the spectral range of 530-700 nm is reported using an epitaxial barium titanate (BaTiO₃) thin film waveguide. The epitaxial layers are multidomain consisting of both a and c domain variants. The SHG conversion efficiency is nearly independent of wavelength over the visible spectra range. An enhanced broadband conversion efficiency was observed that is attributed to random quasi-phase matching in the polydomain epitaxial layers. In contrast to theory of SHG for disordered nonlinear media, the observed SHG shows a quadratic dependence on pump power.

Original language	English (US)
Article number	221103
Journal	Applied Physics Letters
Volume	92
Issue number	22
DOIs	https://doi.org/10.1063/1.2936934
State	Published - 2008

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{906189c5ba2a469190574494633938ec,

title = "Highly efficient broadband second harmonic generation using polydomain epitaxial barium titanate thin film waveguides",

abstract = "Broad band second harmonic generation (SHG) over the spectral range of 530-700 nm is reported using an epitaxial barium titanate (BaTiO3) thin film waveguide. The epitaxial layers are multidomain consisting of both a and c domain variants. The SHG conversion efficiency is nearly independent of wavelength over the visible spectra range. An enhanced broadband conversion efficiency was observed that is attributed to random quasi-phase matching in the polydomain epitaxial layers. In contrast to theory of SHG for disordered nonlinear media, the observed SHG shows a quadratic dependence on pump power.",

author = "Lin, {Pao Tai} and Wessels, {B. W.} and Jang, {Joon I.} and Ketterson, {J. B.}",

note = "Funding Information: The authors thank Dr. David J. Towner for preparing thin film crystals. This work is supported by the NSF ECS-0457610, NSF DMR-0306731, and NSF MRSEC under DMR-0520513.",

year = "2008",

doi = "10.1063/1.2936934",

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volume = "92",

journal = "Applied Physics Letters",

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T1 - Highly efficient broadband second harmonic generation using polydomain epitaxial barium titanate thin film waveguides

AU - Lin, Pao Tai

AU - Wessels, B. W.

AU - Jang, Joon I.

AU - Ketterson, J. B.

N1 - Funding Information: The authors thank Dr. David J. Towner for preparing thin film crystals. This work is supported by the NSF ECS-0457610, NSF DMR-0306731, and NSF MRSEC under DMR-0520513.

PY - 2008

Y1 - 2008

N2 - Broad band second harmonic generation (SHG) over the spectral range of 530-700 nm is reported using an epitaxial barium titanate (BaTiO3) thin film waveguide. The epitaxial layers are multidomain consisting of both a and c domain variants. The SHG conversion efficiency is nearly independent of wavelength over the visible spectra range. An enhanced broadband conversion efficiency was observed that is attributed to random quasi-phase matching in the polydomain epitaxial layers. In contrast to theory of SHG for disordered nonlinear media, the observed SHG shows a quadratic dependence on pump power.

AB - Broad band second harmonic generation (SHG) over the spectral range of 530-700 nm is reported using an epitaxial barium titanate (BaTiO3) thin film waveguide. The epitaxial layers are multidomain consisting of both a and c domain variants. The SHG conversion efficiency is nearly independent of wavelength over the visible spectra range. An enhanced broadband conversion efficiency was observed that is attributed to random quasi-phase matching in the polydomain epitaxial layers. In contrast to theory of SHG for disordered nonlinear media, the observed SHG shows a quadratic dependence on pump power.

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Highly efficient broadband second harmonic generation using polydomain epitaxial barium titanate thin film waveguides

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