Frequency-selective perovskite photodetector for anti-interference optical communications

Liangliang Min; Haoxuan Sun; Linqi Guo; Meng Wang; Fengren Cao; Jun Zhong; Liang Li

doi:10.1038/s41467-024-46468-5

Frequency-selective perovskite photodetector for anti-interference optical communications

Nat Commun. 2024 Mar 7;15(1):2066. doi: 10.1038/s41467-024-46468-5.

Authors

Liangliang Min¹, Haoxuan Sun², Linqi Guo¹, Meng Wang¹, Fengren Cao¹, Jun Zhong³, Liang Li⁴

Affiliations

¹ School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou, 215006, China.
² School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou, 215006, China. hxsun@suda.edu.cn.
³ Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, China.
⁴ School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou, 215006, China. lli@suda.edu.cn.

Abstract

Free-space coupling, essential for various communication applications, often faces significant signal loss and interference from ambient light. Traditional methods rely on integrating complex optical and electronic systems, leading to bulkier and costlier communication equipment. Here, we show an asymmetric 2D-3D-2D perovskite structure device to achieve a frequency-selective photoresponse in a single device. By combining two electromotive forces of equal magnitude in the opposite directions, the device output is attenuated to zero under constant light illumination. Because these reverse photodiodes have different response speeds, the device only responds near a certain frequency, which can be tuned by manipulating the 2D perovskite components. The target device achieves an ultrafast response of 19.7/18.3 ns in the frequency-selective photoresponse range 0.8-9.7 MHz. This anti-interference photodetector can accurately transmit character and video data under strong light interference with a source intensity of up to 454 mW cm^-2.