Highly efficient acousto-optic modulation using nonsuspended thin-film lithium niobate-chalcogenide hybrid waveguides

Lei Wan; Zhiqiang Yang; Wenfeng Zhou; Meixun Wen; Tianhua Feng; Siqing Zeng; Dong Liu; Huan Li; Jingshun Pan; Ning Zhu; Weiping Liu; Zhaohui Li

doi:10.1038/s41377-022-00840-6

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Highly efficient acousto-optic modulation using nonsuspended thin-film lithium niobate-chalcogenide hybrid waveguides

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- Highly efficient acousto-optic modulation using nonsuspended thin-film lithium niobate-chalcogenide hybrid waveguides
- Light: Science & Applications Vol. 11, Issue 6, Pages: 1285-1295(2022)
- Affiliations：
  
  1.Department of Electronic Engineering, College of Information Science and Technology, Jinan University, 510632 Guangzhou, China
  2.Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems, Sun Yat-sen University, 510275 Guangzhou, China
  3.State Key Laboratory for Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Zijingang Campus, 310058 Hangzhou, China
  4.Institute of Semiconductor Science and Technology, Guangdong Engineering Technology Research Center of Low Carbon and New Energy Materials, South China Normal University, 510631 Guangzhou, China
  5.Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519000 Zhuhai, China
- Author bio：
  
  Lei Wan (wanlei@jnu.edu.cn)
  Zhaohui Li (lzhh88@sysu.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-00840-6
  CLC：
- Published：30 June 2022，
  
  Published Online：20 May 2022，
  
  Received：18 December 2021，
  
  Revised：07 May 2022，
  
  Accepted：08 May 2022
- Accepted：
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Wan, L. et al. Highly efficient acousto-optic modulation using nonsuspended thin-film lithium niobate-chalcogenide hybrid waveguides. Light: Science & Applications, 11, 1285-1295 (2022).
DOI：

Wan, L. et al. Highly efficient acousto-optic modulation using nonsuspended thin-film lithium niobate-chalcogenide hybrid waveguides. Light: Science & Applications, 11, 1285-1295 (2022). DOI： 10.1038/s41377-022-00840-6.

摘要

Abstract

A highly efficient on-chip acousto-optic modulator is as a key component and occupies an exceptional position in microwave-to-optical conversion. Homogeneous thin-film lithium niobate is preferentially employed to build the suspended configuration for the acoustic resonant cavity

with the aim of improving the modulation efficiency of the device. However

the limited cavity length and complex fabrication recipe of the suspended prototype restrain further breakthroughs in modulation efficiency and impose challenges for waveguide fabrication. In this work

based on a nonsuspended thin-film lithium niobate-chalcogenide glass hybrid Mach–Zehnder interfero

meter waveguide platform

we propose and demonstrate a built-in push-pull acousto-optic modulator with a half-wave-voltage-length product

as low as 0.03 V cm that presents a modulation efficiency comparable to that of a state-of-the-art suspended counterpart. A microwave modulation link is demonstrated using our developed built-in push-pull acousto-optic modulator

which has the advantage of low power consumption. The nontrivial acousto-optic modulation performance benefits from the superior photoelastic property of the chalcogenide membrane and the completely bidirectional participation of the antisymmetric Rayleigh surface acoustic wave mode excited by the impedance-matched interdigital transducer

overcoming the issue of low modulation efficiency induced by the incoordinate energy attenuation of acoustic waves applied to the Mach–Zehnder interferometer with two arms in traditional push-pull acousto-optic modulators.

关键词

Keywords

references

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