High-speed electro-optic modulation in topological interface states of a one-dimensional lattice

Yong Zhang; Jian Shen; Jingchi Li; Hongwei Wang; Chenglong Feng; Lei Zhang; Lu Sun; Jian Xu; Ming Liu; Ying Wang; Yonghui Tian; Jianwen Dong; Yikai Su

doi:10.1038/s41377-023-01251-x

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High-speed electro-optic modulation in topological interface states of a one-dimensional lattice

Original Articles

- High-speed electro-optic modulation in topological interface states of a one-dimensional lattice
- Light: Science & Applications Vol. 12, Issue 9, Pages: 1961-1970(2023)
- Affiliations：
  
  1.State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  2.Center for Advanced Electronic Materials and Devices, Shanghai Jiao Tong University, Shanghai 200240, China
  3.Institute of Microelectronics and Key Laboratory for Magnetism and Magnetic Materials of MOE, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000 Gansu, China
  4.State Key Laboratory of Optoelectronic Materials and Technologies & School of Physics, Sun Yat-sen University, Guangzhou 510275, China
- Author bio：
  
  Yong Zhang (yongzhang@sjtu.edu.cn)
  Yikai Su (yikaisu@sjtu.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01251-x
  CLC：
- Published：30 September 2023，
  
  Published Online：29 August 2023，
  
  Received：06 February 2023，
  
  Revised：14 July 2023，
  
  Accepted：03 August 2023
- Accepted：
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Zhang, Y. et al. High-speed electro-optic modulation in topological interface states of a one-dimensional lattice. Light: Science & Applications, 12, 1961-1970 (2023).
DOI：

Zhang, Y. et al. High-speed electro-optic modulation in topological interface states of a one-dimensional lattice. Light: Science & Applications, 12, 1961-1970 (2023). DOI： 10.1038/s41377-023-01251-x.

摘要

Abstract

Electro-optic modulators are key components in data communication

microwave photonics

and quantum photonics. Modulation bandwidth

energy efficiency

and device dimension are crucial metrics of modulators. Here

we provide an important direction for the miniaturization of electro-optic modulators by reporting on ultracompact topological modulators. A topological interface state in a one-dimensional lattice is implemented on a thin-film lithium-niobate integrated platform. Due to the strong optical confinement of the interface state and the peaking enhancement of the electro-optic response

a topological cavity with a size of 1.6 × 140 μm

enables a large modulation bandwidth of 104 GHz. The first topological modulator exhibits the most compact device size compared to reported LN modulators with bandwidths above 28 GHz

to the best of our knowledge. 100 Gb/s non-return-to-zero and 100 Gb/s four-level pulse amplitude modulation signals are generated. The switching energy is 5.4 fJ/bit

owing to the small electro-optic mode volume and low capacitance. The topological modulator accelerates the response time of topological photonic devices from the microsecond order to the picosecond order and provides an essential foundation for the implementation of large-scale lithium-niobate photonic integrated circuits.

关键词

Keywords

references

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