Channel Waveguides in Lithium Niobate and Lithium Tantalate
Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel wavegu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-08-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/25/17/3925 |
| _version_ | 1797555347310772224 |
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| author | Yi Lu Benjamin Johnston Peter Dekker Michael J. Withford Judith M. Dawes |
| author_facet | Yi Lu Benjamin Johnston Peter Dekker Michael J. Withford Judith M. Dawes |
| author_sort | Yi Lu |
| collection | DOAJ |
| description | Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K<sub>2</sub>O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 ± 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties. |
| first_indexed | 2024-03-10T16:46:10Z |
| format | Article |
| id | doaj.art-baa2d2e1164f4f1888758f7146fb4afd |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T16:46:10Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-baa2d2e1164f4f1888758f7146fb4afd2023-11-20T11:39:02ZengMDPI AGMolecules1420-30492020-08-012517392510.3390/molecules25173925Channel Waveguides in Lithium Niobate and Lithium TantalateYi Lu0Benjamin Johnston1Peter Dekker2Michael J. Withford3Judith M. Dawes4MQ Photonics, Department of Physics, Macquarie University, Sydney, NSW 2109, AustraliaMQ Photonics, Department of Physics, Macquarie University, Sydney, NSW 2109, AustraliaMQ Photonics, Department of Physics, Macquarie University, Sydney, NSW 2109, AustraliaMQ Photonics, Department of Physics, Macquarie University, Sydney, NSW 2109, AustraliaMQ Photonics, Department of Physics, Macquarie University, Sydney, NSW 2109, AustraliaLow-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K<sub>2</sub>O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 ± 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties.https://www.mdpi.com/1420-3049/25/17/3925lithium niobatelaser processingcrystalline waveguideliquid phase epitaxy |
| spellingShingle | Yi Lu Benjamin Johnston Peter Dekker Michael J. Withford Judith M. Dawes Channel Waveguides in Lithium Niobate and Lithium Tantalate Molecules lithium niobate laser processing crystalline waveguide liquid phase epitaxy |
| title | Channel Waveguides in Lithium Niobate and Lithium Tantalate |
| title_full | Channel Waveguides in Lithium Niobate and Lithium Tantalate |
| title_fullStr | Channel Waveguides in Lithium Niobate and Lithium Tantalate |
| title_full_unstemmed | Channel Waveguides in Lithium Niobate and Lithium Tantalate |
| title_short | Channel Waveguides in Lithium Niobate and Lithium Tantalate |
| title_sort | channel waveguides in lithium niobate and lithium tantalate |
| topic | lithium niobate laser processing crystalline waveguide liquid phase epitaxy |
| url | https://www.mdpi.com/1420-3049/25/17/3925 |
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