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| Hauptverfasser: | , , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2504.17980 |
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| _version_ | 1866908337264656384 |
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| author | Shelton, Anna Xin, C. J. Powell, Keith Yang, Jiayu Lu, Shengyuan Sinclair, Neil Loncar, Marko |
| author_facet | Shelton, Anna Xin, C. J. Powell, Keith Yang, Jiayu Lu, Shengyuan Sinclair, Neil Loncar, Marko |
| contents | We explore a robust fabrication process for periodically-poled thin-film lithium tantalate (PP-TFLT) by systematically varying fabrication parameters and confirming the quality of inverted domains with second-harmonic microscopy (SHM). We find a periodic poling recipe that can be applied to both acoustic-grade and optical-grade film, electrode material, and presence of an oxide interlayer. By using a single high-voltage electrical pulse with peak voltage time of 10 ms or less and a ramp-down time of 90 s, rectangular poling domains are established and stabilized in the PP-TFLT. We employ our robust periodic poling process in a controllable pole-after-etch approach to produce PP-TFLT ridge waveguides with normalized second harmonic generation (SHG) conversion efficiencies of 208 %W-1cm-2 from 1550 nm to 775 nm in line with the theoretical value of 244 %W-1cm-2. This work establishes a high-performance poling process and demonstrates telecommunications band SHG for thin-film lithium tantalate, expanding the capabilities of the platform for frequency mixing applications in quantum photonics, sensing, and spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_17980 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robust Poling and Frequency Conversion on Thin-Film Periodically Poled Lithium Tantalate Shelton, Anna Xin, C. J. Powell, Keith Yang, Jiayu Lu, Shengyuan Sinclair, Neil Loncar, Marko Optics We explore a robust fabrication process for periodically-poled thin-film lithium tantalate (PP-TFLT) by systematically varying fabrication parameters and confirming the quality of inverted domains with second-harmonic microscopy (SHM). We find a periodic poling recipe that can be applied to both acoustic-grade and optical-grade film, electrode material, and presence of an oxide interlayer. By using a single high-voltage electrical pulse with peak voltage time of 10 ms or less and a ramp-down time of 90 s, rectangular poling domains are established and stabilized in the PP-TFLT. We employ our robust periodic poling process in a controllable pole-after-etch approach to produce PP-TFLT ridge waveguides with normalized second harmonic generation (SHG) conversion efficiencies of 208 %W-1cm-2 from 1550 nm to 775 nm in line with the theoretical value of 244 %W-1cm-2. This work establishes a high-performance poling process and demonstrates telecommunications band SHG for thin-film lithium tantalate, expanding the capabilities of the platform for frequency mixing applications in quantum photonics, sensing, and spectroscopy. |
| title | Robust Poling and Frequency Conversion on Thin-Film Periodically Poled Lithium Tantalate |
| topic | Optics |
| url | https://arxiv.org/abs/2504.17980 |