2204119 (1 of 9) © 2022 Wiley-VCH GmbH www.advmat.de Chiral Rashba Ferroelectrics for Circularly Polarized Light Detection Chang-Chun Fan, Xiang-Bin Han,* Bei-Dou Liang, Chao Shi, Le-Ping Miao, Chao-Yang Chai, Cheng-Dong Liu, Qiong Ye,* and Wen Zhang* C.-C. Fan, X.-B. Han, B.-D. Liang, C.-Y. Chai, C.-D. Liu, Q. Ye, W. Zhang Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, School of Chemistry and Chemical Engineering Southeast University Nanjing, Jiangsu 211189, China E-mail: hanxiangbin@seu.edu.cn; yeqiong@seu.edu.cn; zhangwen@seu.edu.cn C. Shi, L.-P. Miao Chaotic Matter Science Research Center, Department of Materials, Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou, Jiangxi 341000, China The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202204119. DOI: 10.1002/adma.202204119 important in fields of optical communica- tions,[2] substance screening,[3] quantum computing,[4] magnetic recording,[5] med- ical diagnosis,[6] remote sensing,[7] and image processing.[8] However, conventional CPL detection technology is an indirect mode and relies on the installation of mul- tiple optical elements such as polarizers and quarter-wave plates, which is complex and expensive. Therefore, simple, cheap, and high-performance CPL detectors have been pursued to favor the development of miniaturized, integrated, multifunctional, and flexible electro-chiropto-spintronic devices.[8,9] Chiral metal-halide perovsk
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Chiral Rashba Ferroelectrics for Circularly Polarized Light Detection
Chang‐Chun Fan, Xiang‐Bin Han, Bei‐Dou Liang, Chao Shi, Le‐Ping Miao, Chao‐Yang Chai, Cheng‐Dong Liu, Qiong Ye, Wen Zhang
Research context
Direct detection of circularly polarized light (CPL) is a challenging task due to limited materials and ambiguous structure-property relationships that lead to low distinguishability of the light helicities. Perovskite ferroelectric semiconductors incorporating chirality provide new opportunities in dealing with this issue. Herein, a pair of 2D chiral perovskite ferroelectrics is reported, which have enhanced CPL detection performance due to interplays among lattice, photon, charge, spin, and orbit. The chirality-transfer-induced chiral&polar ferroelectric phase enhances the asymmetric nature of the photoactive sublattice and achieves a switchable self-powered detection via the bulk photovoltaic effect. The single-crystal-based device exhibits a CPL-sensitive detection performance under 430 nm with an asymmetric factor of 0.20 for left- and right-CPL differentiation, about two times that of the pure chiral counterparts. The enhanced CPL detection performance is ascribed to the Rashba-Dresselhaus effect that originates from the bulk inversion asymmetry and strong spin-orbit coupling, shown with a large Rashba coefficient, which is demonstrated by density functional theory calculatio
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Chang‐Chun Fan, Xiang‐Bin Han, Bei‐Dou Liang, Chao Shi, Le‐Ping Miao, Chao‐Yang Chai, Cheng‐Dong Liu, Qiong Ye, Wen Zhang. Chiral Rashba Ferroelectrics for Circularly Polarized Light Detection. Advanced Materials (2022). https://doi.org/10.1002/adma.202204119
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