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Comparison of LiNbO3 flux systems for deposition on RIE-etched LiTaO3 substrates
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Marshall, Jessica M., Walker, David, Thomas, Pam A., Dobedoe, R. S., Ren, Z. and Yu, S. (2007) Comparison of LiNbO3 flux systems for deposition on RIE-etched LiTaO3 substrates. Journal of Physics D: Applied Physics, 40 (23). pp. 7480-7484. doi:10.1088/0022-3727/40/23/034 ISSN 0022-3727.
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Official URL: http://dx.doi.org/10.1088/0022-3727/40/23/034
Abstract
Single-crystal LiNbO3 films were deposited by liquid phase epitaxy (LPE) onto inductively coupled plasma-assisted reactive ion etched (RIE) LiTaO3 substrates. The RIE-etched channels were 6 mu m wide by 0.9 mu m deep. Surface roughness at the bottom of trenches was 100 nm or better with sidewall roughness below detection limits. This study also compares the suitability of the LiBO2 - LiNbO3 and the LiVO3 - LiNbO3 flux systems. From high-resolution x-ray diffraction and scanning electron microscopy (SEM) data, LiBO2 - LiNbO3 was determined to be the superior flux system with respect to diffraction profile widths of the 0 0 12 reflection. Films grown from boron-based flux were observed to have narrower x-ray rocking curve widths than films grown from vanadium-based flux, with typical values of the FWHM of 0.018 degrees and 0.041 degrees, respectively. Boron-based LPE was then used to deposit LiNbO3 film onto (RIE) LiTaO3 substrates. SEM imaging and energy dispersive x-ray analysis showed a sharp composition change between film and substrate indicative of a step index change suitable for waveguiding.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Journal of Physics D: Applied Physics | ||||
Publisher: | IOP Publishing | ||||
ISSN: | 0022-3727 | ||||
Official Date: | 16 November 2007 | ||||
Dates: |
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Volume: | 40 | ||||
Number: | 23 | ||||
Number of Pages: | 5 | ||||
Page Range: | pp. 7480-7484 | ||||
DOI: | 10.1088/0022-3727/40/23/034 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Data sourced from Thomson Reuters' Web of Knowledge
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