Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film
Abstract Experimentally achieving the first‐ever electric field periodic poling of single crystal barium titanate oxide (BTO, or BaTiO3) thin film on‐insulator is reported. Owing to the outstanding optical nonlinearities of BTO, this result is a key step toward achieving quasi‐phase‐matching (QPM)....
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| Format: | Article |
| Language: | English |
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Wiley
2024-11-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202406248 |
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| author | Pragati Aashna Hong‐Lin Lin Yu Cao Yuhui Yin Yuan Gao Sakthi Sanjeev Mohanraj Di Zhu Aaron Danner |
| author_facet | Pragati Aashna Hong‐Lin Lin Yu Cao Yuhui Yin Yuan Gao Sakthi Sanjeev Mohanraj Di Zhu Aaron Danner |
| author_sort | Pragati Aashna |
| collection | DOAJ |
| description | Abstract Experimentally achieving the first‐ever electric field periodic poling of single crystal barium titanate oxide (BTO, or BaTiO3) thin film on‐insulator is reported. Owing to the outstanding optical nonlinearities of BTO, this result is a key step toward achieving quasi‐phase‐matching (QPM). First, the BTO thin film is grown on a dysprosium scandate substrate using pulsed laser deposition with a thin layer of strontium ruthenate later serving as the bottom electrode for poling. The characterization of the BTO thin film using x‐ray diffraction (XRD) and piezo‐response force microscopy to demonstrate single crystal, single domain growth of the film that enables the desired periodic poling, are presented. To investigate the poling quality, both non‐destructive piezo force response microscopy and destructive etching‐assisted scanning electron microscopy (SEM) are applied, and it is shown that high quality, uniform, and intransient poling with 50% duty cycle and periods ranging from 2 µm to 10 µm is achieved. The successful realization of periodic poling in BTO thin film unlocks the potential for highly efficient nonlinear processes under QPM that seemed far‐fetched with prior polycrystalline BTO thin films which predominantly relied on efficiency‐limited random or non‐phase matching conditions and is a key step toward integration of BTO photonic devices. |
| format | Article |
| id | doaj-art-ace7c59bfc2e49e09a6f066838654071 |
| institution | OA Journals |
| issn | 2198-3844 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-ace7c59bfc2e49e09a6f0668386540712025-08-20T01:51:14ZengWileyAdvanced Science2198-38442024-11-011142n/an/a10.1002/advs.202406248Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin FilmPragati Aashna0Hong‐Lin Lin1Yu Cao2Yuhui Yin3Yuan Gao4Sakthi Sanjeev Mohanraj5Di Zhu6Aaron Danner7Department of Electrical and Computer Engineering National University of Singapore Singapore 117583 SingaporeDepartment of Electrical and Computer Engineering National University of Singapore Singapore 117583 SingaporeDepartment of Electrical and Computer Engineering National University of Singapore Singapore 117583 SingaporeDepartment of Electrical and Computer Engineering National University of Singapore Singapore 117583 SingaporeDepartment of Electrical and Computer Engineering National University of Singapore Singapore 117583 SingaporeInstitute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR) Singapore 138634 SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 SingaporeDepartment of Electrical and Computer Engineering National University of Singapore Singapore 117583 SingaporeAbstract Experimentally achieving the first‐ever electric field periodic poling of single crystal barium titanate oxide (BTO, or BaTiO3) thin film on‐insulator is reported. Owing to the outstanding optical nonlinearities of BTO, this result is a key step toward achieving quasi‐phase‐matching (QPM). First, the BTO thin film is grown on a dysprosium scandate substrate using pulsed laser deposition with a thin layer of strontium ruthenate later serving as the bottom electrode for poling. The characterization of the BTO thin film using x‐ray diffraction (XRD) and piezo‐response force microscopy to demonstrate single crystal, single domain growth of the film that enables the desired periodic poling, are presented. To investigate the poling quality, both non‐destructive piezo force response microscopy and destructive etching‐assisted scanning electron microscopy (SEM) are applied, and it is shown that high quality, uniform, and intransient poling with 50% duty cycle and periods ranging from 2 µm to 10 µm is achieved. The successful realization of periodic poling in BTO thin film unlocks the potential for highly efficient nonlinear processes under QPM that seemed far‐fetched with prior polycrystalline BTO thin films which predominantly relied on efficiency‐limited random or non‐phase matching conditions and is a key step toward integration of BTO photonic devices.https://doi.org/10.1002/advs.202406248barium titanate‐on‐insulatorsnonlinear frequency conversionnonlinear optical materialsoptoelectronicsperiodic polingquasi‐phase‐matching (QPM) |
| spellingShingle | Pragati Aashna Hong‐Lin Lin Yu Cao Yuhui Yin Yuan Gao Sakthi Sanjeev Mohanraj Di Zhu Aaron Danner Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film Advanced Science barium titanate‐on‐insulators nonlinear frequency conversion nonlinear optical materials optoelectronics periodic poling quasi‐phase‐matching (QPM) |
| title | Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film |
| title_full | Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film |
| title_fullStr | Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film |
| title_full_unstemmed | Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film |
| title_short | Periodic Domain Inversion in Single Crystal Barium Titanate‐on‐Insulator Thin Film |
| title_sort | periodic domain inversion in single crystal barium titanate on insulator thin film |
| topic | barium titanate‐on‐insulators nonlinear frequency conversion nonlinear optical materials optoelectronics periodic poling quasi‐phase‐matching (QPM) |
| url | https://doi.org/10.1002/advs.202406248 |
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