Singapore, 117583 Singapore. 2 State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China. *Email: eleakw@nus.edu.sg Polarization-sensitive photodetection and non-volatile memory are both vital for neuromorphic vision hardware but are rarely integrated within a single device. This challenge arises from interfacial instabilities and depolarization fields at the 2D/ferroelectric junctions that degrade remanent polarization and long-term retention. Here, we demonstrate a polarization-resolved optoelectronic synapse based on a 2D ReS2 channel and a ferroelectric Hf0.5Zr0.5O2 (HZO) gate dielectric in a metal-ferroelectric-metal-insulator-
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Coupled ferroelectric-anisotropic optoelectronic synapse for polarization-sensitive neuromorphic vision
Jiali Huo, Jinpeng Huo, Jing Gao, Lingqi Li, Thaw Tint Te Tun, Jin Peng, Haofei Zheng, Yufei Shi, Kah-Wee Ang
Research context
Polarization-sensitive photodetection and non-volatile memory are both vital for neuromorphic vision hardware but are rarely integrated within a single device. This challenge arises from interfacial instabilities and depolarization fields at the 2D/ferroelectric junctions that degrade remanent polarization and long-term retention. Here, we demonstrate a polarization-resolved optoelectronic synapse based on a 2D ReS2 channel and a ferroelectric Hf0.5Zr0.5O2 (HZO) gate dielectric in a metal-ferroelectric-metal-insulator-semiconductor (MFMIS) ferroelectric field-effect transistor (FeFET). Co-modulation of ferroelectric polarization and photoexcited carrier trapping enables high responsivity, strong detectivity, and long-term optoelectronic retention. Coupling between the polarization anisotropy of ReS2 and ferroelectric memristive states enables gate-tunable polarization ratios and polarization-resolved learning. Furthermore, the optoelectronic synapse exhibits linear and energy-efficient optical–electrical modulation with 2.0 fJ per event. An ANN built from these synapses achieves 97.33% accuracy in iris recognition under unpolarized light, while a 3×3 FeFET-based CNN performs butter
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Jiali Huo, Jinpeng Huo, Jing Gao, Lingqi Li, Thaw Tint Te Tun, Jin Peng, Haofei Zheng, Yufei Shi, Kah-Wee Ang. Coupled ferroelectric-anisotropic optoelectronic synapse for polarization-sensitive neuromorphic vision. Nature Communications (2026). https://doi.org/10.1038/s41467-025-68206-1
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