| Title: |
A barium titanate‐on‐oxide insulator optoelectronics platform |
| Authors: |
Cao, Yu; Tan, Siew Li; Cheung, Eric Jun Hao; Siew, Shawn Yohanes; Li, Changjian; Liu, Yan; Tang, Chi Sin; Lal, Manohar; Chen, Guanyu; Dogheche, Karim; Yang, Ping; Pennycook, Steven; Wee, Andrew Thye Shen; Chua, Soojin; Dogheche, El Hadj; Venkatesan, Thirumalai; Danner, Aaron |
| Contributors: |
National University of Singapore (NUS); Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN); Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA); Université catholique de Lille (UCL)-Université catholique de Lille (UCL); Optoélectronique - IEMN (OPTO - IEMN); INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France); Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN); Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA); This work was supported by the Singapore National Research Foundation (NRF) under the Competitive Research Programs (CRP Grant No. NRF-CRP15-201501). Y.C, E.D, and A.D. would like to acknowledge Hassan Ahmad for his help in the characterization of optical properties. P.Y. was supported by SSLS via NUS Core Support C-380-003-003-001. The authors would also like to acknowledge the Singapore Synchrotron Light Source (SSLS) for providing the facilities necessary for conducting the research. The SSLS is a National Research Infrastructure under the National Research Foundation Singapore. |
| Source: |
ISSN: 0935-9648. |
| Publisher Information: |
CCSD; Wiley-VCH Verlag |
| Publication Year: |
2021 |
| Collection: |
Université Polytechnique Hauts-de-France: HAL |
| Subject Terms: |
barium titanate-on-insulators; low loss; nonlinear optical materials; optoelectronics; waveguides; [SPI]Engineering Sciences [physics] |
| Description: |
International audience ; Electro-optic modulators are among the most important building blocks in optical communication networks. Lithium niobate, for example, has traditionally been widely used to fabricate high-speed optical modulators due to its large Pockels effect. Another material, barium titanate, nominally has a 50 times stronger r-parameter and would ordinarily be a more attractive material choice for such modulators or other applications. In practice, barium titanate thin films for optical waveguide devices are usually grown on magnesium oxide due to its low refractive index, allowing vertical mode confinement. However, the crystal quality is normally degraded. Here, a group of scandate-based substrates with small lattice mismatch and low refractive index compared to that of barium titanate is identified, thus concurrently satisfying high crystal quality and vertical optical mode confinement. This work provides a platform for nonlinear on-chip optoelectronics and can be promising for waveguide-based optical devices such as Mach-Zehnder modulators, wavelength division multiplexing, and quantum optics-on-chip. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| ISBN: |
978-0-00-678684-9; 0-00-678684-7 |
| Relation: |
WOS: 000678684700001 |
| DOI: |
10.1002/adma.202101128 |
| Availability: |
https://hal.science/hal-03501430; https://hal.science/hal-03501430v1/document; https://hal.science/hal-03501430v1/file/Cao2021.pdf; https://doi.org/10.1002/adma.202101128 |
| Rights: |
https://creativecommons.org/licenses/by-nc/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.1AC05A44 |
| Database: |
BASE |