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High-contrast coercive field engineering for periodic poling of RbKTiOPO4 with Ba2+/K+ ion-exchange
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- Barrett, Laura (author)
- KTH,Laserfysik
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- Lee, Cherrie, 1992- (author)
- KTH,Biomedicinsk fysik och röntgenfysik
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- Zukauskas, Andrius (author)
- KTH,Laserfysik
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- Optica Publishing Group, 2024
- 2024
- English.
- In: Optics Express. - : Optica Publishing Group. - 1094-4087. ; 32:8, s. 14252-14260
- Journal article (peer-reviewed)
Abstract
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- We investigate a new method of coercive field engineering for periodic poling of RbKTiOPO4 (RKTP). By ion exchanging RKTP in a molten salt containing 7 mol% Ba(NO3)2 and 93 mol% KNO3 we achieve more than an order of magnitude difference in polarization switching time between the exchanged and non-exchanged regions. This method is used to fabricate periodic gratings of 2.92 µm in 1 mm thick bulk RKTP for second harmonic generation at 779 nm with a normalized conversion efficiency of 2%/Wcm. We show that the poled domain structures are stable at 300 °C, and that there is no bulk refractive index modification associated with the periodic ion exchange.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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- ref (subject category)
- art (subject category)
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- Royal Institute of Technology
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