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A Barium Titanate-on-Oxide Insulator Optoelectronics Platform
Advanced Materials ( IF 27.4 ) Pub Date : 2021-07-29 , DOI: 10.1002/adma.202101128 Yu Cao 1, 2 , Siew Li Tan 1 , Eric Jun Hao Cheung 1 , Shawn Yohanes Siew 1 , Changjian Li 3 , Yan Liu 1 , Chi Sin Tang 4, 5 , Manohar Lal 1 , Guanyu Chen 1 , Karim Dogheche 6 , Ping Yang 3, 5 , Steven Pennycook 3 , Andrew Thye Shen Wee 2 , Soojin Chua 1 , Elhadj Dogheche 6 , Thirumalai Venkatesan 1, 2 , Aaron Danner 1
Advanced Materials ( IF 27.4 ) Pub Date : 2021-07-29 , DOI: 10.1002/adma.202101128 Yu Cao 1, 2 , Siew Li Tan 1 , Eric Jun Hao Cheung 1 , Shawn Yohanes Siew 1 , Changjian Li 3 , Yan Liu 1 , Chi Sin Tang 4, 5 , Manohar Lal 1 , Guanyu Chen 1 , Karim Dogheche 6 , Ping Yang 3, 5 , Steven Pennycook 3 , Andrew Thye Shen Wee 2 , Soojin Chua 1 , Elhadj Dogheche 6 , Thirumalai Venkatesan 1, 2 , Aaron Danner 1
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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.
中文翻译：
氧化钛绝缘体光电平台
电光调制器是光通信网络中最重要的构建模块之一。例如，铌酸锂由于其大普克尔斯效应，传统上被广泛用于制造高速光调制器。另一种材料，钛酸钡，名义上具有50倍强ř参数，通常是此类调制器或其他应用的更有吸引力的材料选择。实际上，用于光波导器件的钛酸钡薄膜通常生长在氧化镁上，因为它的折射率低，允许垂直模式限制。然而，晶体质量通常会降低。在这里，确定了一组与钛酸钡相比具有小晶格失配和低折射率的基于钪酸盐的衬底，从而同时满足高晶体质量和垂直光学模式限制。这项工作为非线性片上光电子学提供了一个平台，并且有望用于基于波导的光学器件，例如 Mach-Zehnder 调制器、波分复用和片上量子光学。
更新日期：2021-09-14
中文翻译：
氧化钛绝缘体光电平台
电光调制器是光通信网络中最重要的构建模块之一。例如，铌酸锂由于其大普克尔斯效应，传统上被广泛用于制造高速光调制器。另一种材料，钛酸钡，名义上具有50倍强ř参数，通常是此类调制器或其他应用的更有吸引力的材料选择。实际上，用于光波导器件的钛酸钡薄膜通常生长在氧化镁上，因为它的折射率低，允许垂直模式限制。然而，晶体质量通常会降低。在这里，确定了一组与钛酸钡相比具有小晶格失配和低折射率的基于钪酸盐的衬底，从而同时满足高晶体质量和垂直光学模式限制。这项工作为非线性片上光电子学提供了一个平台，并且有望用于基于波导的光学器件，例如 Mach-Zehnder 调制器、波分复用和片上量子光学。
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