Two-dimensional semiconducting SnP2Se6 with giant second-harmonic-generation for monolithic on-chip electronic-photonic integration

Cheng-Yi Zhu, Zimeng Zhang, Jing-Kai Qin (), Zi Wang, Cong Wang, Peng Miao, Yingjie Liu, Pei-Yu Huang, Yao Zhang, Ke Xu (), Liang Zhen, Yang Chai () and Cheng-Yan Xu ()
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Cheng-Yi Zhu: Harbin Institute of Technology (Shenzhen)
Zimeng Zhang: Harbin Institute of Technology (Shenzhen)
Jing-Kai Qin: Harbin Institute of Technology (Shenzhen)
Zi Wang: Harbin Institute of Technology (Shenzhen)
Cong Wang: The Hong Kong Polytechnic University
Peng Miao: HORIBA Scientific
Yingjie Liu: Harbin Institute of Technology (Shenzhen)
Pei-Yu Huang: Harbin Institute of Technology (Shenzhen)
Yao Zhang: Harbin Institute of Technology (Shenzhen)
Ke Xu: Harbin Institute of Technology (Shenzhen)
Liang Zhen: Harbin Institute of Technology (Shenzhen)
Yang Chai: The Hong Kong Polytechnic University
Cheng-Yan Xu: Harbin Institute of Technology (Shenzhen)

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Two-dimensional (2D) layered semiconductors with nonlinear optical (NLO) properties hold great promise to address the growing demand of multifunction integration in electronic-photonic integrated circuits (EPICs). However, electronic-photonic co-design with 2D NLO semiconductors for on-chip telecommunication is limited by their essential shortcomings in terms of unsatisfactory optoelectronic properties, odd-even layer-dependent NLO activity and low NLO susceptibility in telecom band. Here we report the synthesis of 2D SnP2Se6, a van der Waals NLO semiconductor exhibiting strong odd-even layer-independent second harmonic generation (SHG) activity at 1550 nm and pronounced photosensitivity under visible light. The combination of 2D SnP2Se6 with a SiN photonic platform enables the chip-level multifunction integration for EPICs. The hybrid device not only features efficient on-chip SHG process for optical modulation, but also allows the telecom-band photodetection relying on the upconversion of wavelength from 1560 to 780 nm. Our finding offers alternative opportunities for the collaborative design of EPICs.

Date: 2023
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DOI: 10.1038/s41467-023-38131-2

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