2026-10-12T03:09:17Z https://www.scidb.cn/oai

10.57760/sciencedb.hep.00013 2026-05-25T14:41:16Z

2026-05-25 Supplyment to the article"Polarization-sensitive photo-synapses based on anisotropic β-Ga2O3 for dynamic visual perception" doi:10.57760/sciencedb.hep.00013 en Supplyment to the article"Polarization, as a fundamental property of light, carries abundant environmental and target-specific information that is invisible to the human eye but crucial for advanced vision. In biological visual systems, such polarization information is effectively encoded, processed, and integrated to enhance scene perception and target recognition. Inspired by this biological paradigm, polarization sensitive optoelectronic synapses provide a promising pathway toward information perception and neuromorphic computing. Benefiting from its low-symmetry monoclinic lattice, β-Ga2O3 inherently exhibits strong optical absorption anisotropy, which can be used to enable photo-synapses. Here, the structural anisotropy of β-Ga2O3 single crystals with (100), (010), and (001) orientations was systematically investigated through atomic arrangement analysis, polarization-resolved Raman spectroscopy, polarization-dependent absorption, and XPS characterization. Compared with the (010) and (001) orientations, the (100) β-Ga2O3 crystal exhibited stronger optical absorption anisotropy and a higher density of oxygen vacancies, making it a favorable candidate for constructing polarization-sensitive neuromorphic synapses. A solar-blind polarization-sensitive optoelectronic synapse was developed in this work, demonstrating polarization-dependent excitatory postsynaptic currents (EPSC), paired-pulse facilitation (PPF), and learning-forgetting-relearning functionalities. Furthermore, the optoelectronic synapse enabled the construction of a neuromorphic visual system (NVS), achieving noise suppression, enhanced image quality, and handwritten digit recognition accuracy up to 98.74%. Beyond static recognition, integration of the arrays into a reservoir computing system allowed efficient motion direction perception with accuracies approaching 99.7%. These results highlight the potential of anisotropic β-Ga2O3 as a material foundation for next-generation solar-blind polarization-sensitive neuromorphic vision systems." polarization; β-Ga2O3; anisotropy; optoelectronic synapses; solar-blind Xianchun Shen Chao Wu Yanjie Liu Zhihao Yu Zhenyang Wang Daoyou Guo PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.15302/frontphys.2026.104202 Science Data Bank