A Room‐Temperature Terahertz Photodetector Imaging with High Stability and Polarization‐Sensitive Based on Perovskite/Metasurface

RESEARCH ARTICLE www.advancedscience.com A Room-Temperature Terahertz Photodetector Imaging with High Stability and Polarization-Sensitive Based on Perovskite/Metasurface Yifan Li, Yiming Jia, He Yang, Yinghui Wu,* Yajun Cao, Xuyang Zhang, Cunguang Lou, Xiuling Liu,* Long-Biao Huang,* and Jianquan Yao Terahertz (THz) polarization detection facilitates the capture of multidimensional data, including intensity, phase, and polarization state, with broad applicability in high-resolution imaging, communication, and remote sensing. However, conventional semiconductor materials are limited by energy band limitations, rendering them unsuitable for THz detection. Overcoming this challenge, the realization of high-stability, room-temperature polarization-sensitive THz photodetectors (PDs) leveraging the thermoelectric effect of Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 (CsFAMA)/metasurfaces is presented. Two different structures of (T-shaped and I-shaped) THz PDs are constructed. The incorporation of perovskite/metasurfaces forms enhanced local field thermoelectric effect and polarization response. Owning to THz surface plasmon polariton (SPP) resonance effect and more boundary effect, the I-shaped PDs exhibit superior performance, achieving a response of up to 94 V/W, with a response time of 138 μs, a low noise-equivalent power of 5.03 pW/Hz1/2 and an anisotropy ratio of 1.38 under 0.1THz laser irradiation. Furthermore, the PD’s stability is verified with the anisotropy ratio decreased by only 2% and polarization imaging results after 240 days of storage in air condition. This research introduces a method for achieving high-performance, stable THz polarization detection technology, with significant potential for advancements in materials science, communication technology, and medical imaging. Y. Li, Y. Jia, H. Yang, C. Lou, X. Liu College of Electronic Information Engineering & Hebei Key Laboratory of Digital Medical Engineering Hebei University Baoding 071000, China E-mail: liuxiuling@hbu.edu.cn Y.Li,J.Yao School of Precision Instruments andOpto-Electronics Engineering Tianjin University Tianjin 300072,China The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/advs.202407634 © 2024 The Author(s). Advanced Science published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. DOI: 10.1002/advs.202407634 1. Introduction Terahertz (THz) polarization-sensitive detection offers a comprehensive of mul- tidimensional information, encompassing intensity, polarization type, and orientation angle, thereby significantly enhancing detection sensitivity and dimensionality.[1,2] This capability exhibits considerable promise for applications in communi- cations, radar, high-resolution imaging, and beyond.[3–6] Currently, THz detec- tion predominantly utilizes the principles of photoelectric, nonlinear optical, and photothermoelectric (PTE) effects.[7–9] In particular, THz PTE detectors have attracted considerable attention owing to their ability to operate effectively at room-temperature, wavelength non- selectivity, and rapid response.[10–12] There is a compelling need for high-stability, polarization-sensitive THz PDs that can acquire multidimensional information at room-temperature.[13–16] Previous stud- ies have demonstrated that polarization information can be extracted through traditional polarization photodetection Y. Wu, Y. Cao, X. Zhang, L.-B. Huang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060, China E-mail: yinghui@szu.edu.cn;huanglb@szu.edu.cn L.-B.Huang National Key Laboratory of Green andLong-LifeRoadEngineering in Ex- tremeEnvironment Shenzhen University Shenzhen 518060, China Adv. Sci.