Affiliation:
1. Max Planck School of Photonics
2. Fraunhofer Institute for Applied Optics and Precision Engineering
Abstract
Spatial engineering of the nonlinear susceptibility
χ
(
2
)
in resonant metasurfaces offers a new degree of freedom in the design of the far-field response of second-harmonic generation (SHG). We demonstrate this by applying electric field poling to lithium niobate (LN) thin films, which inverts the spontaneous polarization and thus the sign of
χ
(
2
)
. Metasurfaces fabricated in periodically poled LN films reveal the distinct influence of the
χ
(
2
)
-patterning on the spatial distribution of the second harmonic. This work is a first step toward far-field engineering of SHG in metasurfaces with electric field poling.
Funder
Freistaat Thüringen
The European Union
Bundesministerium für Bildung und Forschung
Deutsche Forschungsgemeinschaft
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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