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https://doi.org/10.1002/adma.202101128
Title: | A barium titanate‐on‐oxide insulator optoelectronics platform | Authors: | Yu Cao Siew Li Tan Eric Jun Hao Cheung Shawn Yohanes Siew Changjian Li Yan Liu Chi Sin Tang Manohar Lal Guanyu Chen Karim Dogheche Ping Yang Steven Pennycook Andrew Thye Shen Wee Soojin Chua Elhadj Dogheche Thirumalai Venkatesan Aaron Danner |
Issue Date: | 29-Jul-2021 | Publisher: | Advanced Materials | Citation: | Yu Cao, Siew Li Tan, Eric Jun Hao Cheung, Shawn Yohanes Siew, Changjian Li, Yan Liu, Chi Sin Tang, Manohar Lal, Guanyu Chen, Karim Dogheche, Ping Yang, Steven Pennycook, Andrew Thye Shen Wee, Soojin Chua, Elhadj Dogheche, Thirumalai Venkatesan, Aaron Danner (2021-07-29). A barium titanate‐on‐oxide insulator optoelectronics platform. Advanced Materials 33 : 2101128 (1-7). ScholarBank@NUS Repository. https://doi.org/10.1002/adma.202101128 | Rights: | CC0 1.0 Universal | Abstract: | 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. | Source Title: | Advanced Materials | URI: | https://scholarbank.nus.edu.sg/handle/10635/232262 | ISSN: | 0935-9648 1521-4095 |
DOI: | 10.1002/adma.202101128 | Rights: | CC0 1.0 Universal |
Appears in Collections: | Elements Staff Publications |
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