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Influence of divalent and monovalent doping on the ferroelectric and optical properties of RbKTiOPO4
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DOI：10.1364/OE.551153.png)
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Abstract
En 中文
Coercive field (Ec) engineering based upon the monovalent Rb+ ion (Rb/K/Baexchange) and the divalent Ba2+ ion (Ba/K-exchange) has enabled the reliable periodic poling of RbKTiOPO4 (RKTP) for quasi-phase-matching (QPM). Previously, there have been no systematic studies to understand and compare the changes in polarization-switching properties induced by these two families of exchanges. In this paper, we compare different compositions of Rb/K/Baand Ba/K-exchanges in terms of how they affect the polarization-switching time, ts, and ionic conductivity in RKTP. We discuss the change in switching time, ts, that is ascribed to the interplay between the monovalent and divalent cations in the exchange. Moreover, we propose exchange-induced strain as the cause of bulk phase-matching shift and show that exchanges containing lower amounts of Rb induce less strain. This is corroborated by strain-deformation measurements on the exchanged samples. Finally, we demonstrate highly efficient periodically poled RKTP crystals free of bulk changes, using two different high ts - low strain exchanges.
Keywords:
POTASSIUM TITANYL PHOSPHATE
RB-DOPED KTIOPO4
2ND-HARMONIC GENERATION
IONIC-CONDUCTIVITY
WAVE-GUIDES
KTP
FABRICATION
BA
Journal
IF:
3.3
Papers:
6.1W
Citations:
14.3W
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