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High potassium KTiOPO4 crystals for the fabrication of quasi-phase matched devices
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UNSPECIFIED (2003) High potassium KTiOPO4 crystals for the fabrication of quasi-phase matched devices. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 36 (11). pp. 1236-1241. ISSN 0022-3727
Full text not available from this repository.Abstract
This paper reports a suppressed ionic conductivity in a KTiOPO4 (KTP) crystal grown from a potassium-rich K4P2O7 flux. Potassium-rich KTP is shown to have an ionic conductivity, which is reduced by one order of magnitude relative to normal flux-grown KTP and is explained by an improved potassium-oxygen stoichiometry. However, it is found that the frequency dispersion of the conductivity is almost identical in form to that of conventional KTP, showing that the fundamental Debye-like origin of the conductivity is unchanged as the number of potassium vacancies is decreased. This behaviour is contrasted with that of Rb-doped KTP, in which the conductivity is reduced by a factor of more than 100 and the dispersion is drastically changed to resemble a disordered system rather than a Debye-like relaxor. Potassium-rich KTP is also found to have a reduced low-frequency dielectric constant, a contracted Cole-Cole plot and a lowered ferroelectric coercive electric field of only 3.0(+/-0.1) kV mm(-1) at room temperature. Successful periodic poling of a potassium-rich KTP crystal to produce a grating of 60 mum period is demonstrated at room temperature for the first time. X-ray topographs proving the existence of periodic domains throughout the bulk of potassium-rich KTP in both the usual [100] grating orientation and the unconventional [010] orientation are presented.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Journal or Publication Title: | JOURNAL OF PHYSICS D-APPLIED PHYSICS |
| Publisher: | IOP PUBLISHING LTD |
| ISSN: | 0022-3727 |
| Date: | 7 June 2003 |
| Volume: | 36 |
| Number: | 11 |
| Number of Pages: | 6 |
| Page Range: | pp. 1236-1241 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/9543 |
Data sourced from Thomson Reuters' Web of Knowledge
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