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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.05874 |
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| _version_ | 1866912526976942080 |
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| author | Esfandiar, Hossein Abtahi, Fatemeh Vrckovnik, Trevor G. Ngo, G. Quyet Heller, Rene Kentsch, Ulrich Ganss, Fabian Facsko, Stefan Lucchesi, Uta Winnerl, Stephan Eilenberger, Falk Arslan, Dennis Schmitt, Sebastian W. |
| author_facet | Esfandiar, Hossein Abtahi, Fatemeh Vrckovnik, Trevor G. Ngo, G. Quyet Heller, Rene Kentsch, Ulrich Ganss, Fabian Facsko, Stefan Lucchesi, Uta Winnerl, Stephan Eilenberger, Falk Arslan, Dennis Schmitt, Sebastian W. |
| contents | Barium titanate (BaTiO$_3$) is a compelling material for integrated photonics due to its strong electro-optic and second-order nonlinear properties. Crystal Ion Slicing (CIS) presents a scalable and CMOS-compatible route for fabricating thin BaTiO$_3$ films; however, ion implantation during CIS introduces lattice damage that can degrade structural and optical performance. In this study, we demonstrate that post-slicing thermal annealing effectively restores the structural integrity and optical quality of CIS-processed BaTiO$_3$ flakes. Raman spectroscopy confirms the recovery of crystallinity, while second-harmonic generation (SHG) microscopy reveals systematic reorientation of ferroelectric domains and restoration of the associated second-order nonlinear susceptibility tensor $X^{(2)}$. Notably, SHG signals persist even in regions with weak Raman signatures, indicating that long-range ferroelectric order can survive despite partial lattice disruption. Optical measurements show that the linear dispersion of annealed CIS flakes closely matches that of bulk BaTiO$_3$, validating their suitability for photonic integration. Together, these results qualify CIS - combined with thermal annealing - as a viable and scalable manufacturing strategy for high-quality BaTiO$_3$-on-insulator (BTOI) platforms, enabling advanced integrated photonic devices for modulation, frequency conversion, and quantum optics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_05874 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Structural and Optical Properties of Crystal Ion Sliced BaTiO$_3$ Thin Films Esfandiar, Hossein Abtahi, Fatemeh Vrckovnik, Trevor G. Ngo, G. Quyet Heller, Rene Kentsch, Ulrich Ganss, Fabian Facsko, Stefan Lucchesi, Uta Winnerl, Stephan Eilenberger, Falk Arslan, Dennis Schmitt, Sebastian W. Materials Science Optics Barium titanate (BaTiO$_3$) is a compelling material for integrated photonics due to its strong electro-optic and second-order nonlinear properties. Crystal Ion Slicing (CIS) presents a scalable and CMOS-compatible route for fabricating thin BaTiO$_3$ films; however, ion implantation during CIS introduces lattice damage that can degrade structural and optical performance. In this study, we demonstrate that post-slicing thermal annealing effectively restores the structural integrity and optical quality of CIS-processed BaTiO$_3$ flakes. Raman spectroscopy confirms the recovery of crystallinity, while second-harmonic generation (SHG) microscopy reveals systematic reorientation of ferroelectric domains and restoration of the associated second-order nonlinear susceptibility tensor $X^{(2)}$. Notably, SHG signals persist even in regions with weak Raman signatures, indicating that long-range ferroelectric order can survive despite partial lattice disruption. Optical measurements show that the linear dispersion of annealed CIS flakes closely matches that of bulk BaTiO$_3$, validating their suitability for photonic integration. Together, these results qualify CIS - combined with thermal annealing - as a viable and scalable manufacturing strategy for high-quality BaTiO$_3$-on-insulator (BTOI) platforms, enabling advanced integrated photonic devices for modulation, frequency conversion, and quantum optics. |
| title | Structural and Optical Properties of Crystal Ion Sliced BaTiO$_3$ Thin Films |
| topic | Materials Science Optics |
| url | https://arxiv.org/abs/2508.05874 |