Fuxing Dai

Revised Carrier Transport Model Based on Depletion Region Boundary Dynamic Equilibrium for MWIR HgCdTe

Fuxing Dai, Fang Wang, Xiao Fu, Ruiqi Jiang et autres

Mercury cadmium telluride (HgCdTe) mid-wavelength infrared (MWIR) photodetectors exhibit complex nonlinear responses under high-power laser irradiation, challenging the classical boundary condition of low minority carrier concentration at the depletion region edge. We establish a revised carrier transport model by introducing a finite-concentration …

cn, de (code pays fourni par la source)

Ultra-narrowband perovskite single-crystal photodetector enabled by dynamic space charge region for portable concentration detection

Gangjian Hu, Hongyu Bian, Ding Luo, Junmin Xia et autres

Narrowband photodetectors with wavelength-selective light response are essential for applications involving environmental monitoring and biomedical sensing. Although perovskites with excellent optoelectronic characteristics and tunable bandgaps have been demonstrated as promising candidates for the realization of narrowband detection, their practical performance still lags …

cn (code pays fourni par la source)

Sub-picojoule-per-bit volitional neuromorphic devices for precise targeting and tracking

Yixuan Huang, Qihao Sun, Fuxing Dai, Fang Wang et autres

The technological revolution driven by artificial intelligence has significantly improved the hardware performance, but energy consumption remains a critical bottleneck. The state-of-the-art retinomorphic devices, as core components of artificial intelligence hardware, excel in feature extraction but are constrained by passive attention mechanisms …

cn, gb (code pays fourni par la source)

Engineering optical microcavities in black phosphorus photodiodes: a path to ultrafast polarization-sensitive infrared sensing

Mengjia Xia, Qixiao Zhao, Runzhang Xie, Luyao Guo et autres

cn, us (code pays fourni par la source)

Bioinspired γ‐InSe Opto‐sensor Exhibiting Enhanced Visual Adaptation Mediated by Polarization Sensitivity

Wei Xin, Yanan Fu, Fuxing Dai, Yimeng Shi et autres

Abstract The sophisticated functionality of a bee's compound eye, notably its polarization sensitivity and optical adaptation, offers a robust foundation for its visual perception in an intricate world, drawing increasing attention to bionics inspired by these features. However, replicating the functions in …

cn (code pays fourni par la source)

Ferroelectric Polarization Enhanced Performance and Broadband Photodetector for Neural Network Recognition

Ruiqi Jiang, Yongfeng Jia, Fuxing Dai, Xuming Shi et autres

Abstract The polarization electric field provided by ferroelectric materials can achieve precise control of the carrier concentration in van der Waals semiconductors, providing a more flexible, convenient, and efficient new approach for improving the performance and intelligent application of photodetectors. The UV‐midinfrared …

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Antiferromagnetic semimetal terahertz photodetectors enhanced through weak localization

Dong Wang, Zhen Min Hu, Fang Wang, Xiaokai Pan et autres

Effective detection is critical for terahertz applications, yet it remains hindered by the unclear mechanisms that necessitate a deeper understanding of photosensitive materials with exotic physical phenomena. Here, we investigate the terahertz detection capabilities of the two-dimensional antiferromagnetic semimetal NbFeTe2. Our study …

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Analytical Photoresponses of Schottky‐Contact MoS2 Phototransistors

Jianyong Wei, Yumeng Liu, Yizhuo Wang, Kai Li et autres

Abstract High‐gain photodetectors based on 2D semiconductors have been extensively investigated in the past decades. However, the underlying mechanism remains in dispute without a proper analytical theory. On one side, the classical photogain theory is not applicable, as it was derived on …

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Analytical photoresponses of Schottky contact MoS2 phototransistors

Jianyong Wei, Yumeng Liu, Yizhuo Wang, Kai Li et autres

High-gain photodetectors based on two-dimensional (2D) semiconductors, in particular those in photoconductive mode, have been extensively investigated in the past decade. However, the classical photoconductive theory was derived on two misplaced assumptions. In this work, we established an explicit analytical device model …

Next‐Generation Photodetectors beyond Van Der Waals Junctions (Adv. Mater. 3/2024)

Fang Wang, Tao Zhang, Runzhang Xie, Anna Liu et autres

Next-Generation Photodetectors The van der Waals junction, which is newly flourishing, shows extraordinary performance and versatile manipulation routes. In article number 2301197, Weida Hu and co-workers systematically review most manipulation mechanisms for van der Waals junctions, which could potentially catch the opportunities …

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Dark Current Mechanisms and Suppression Strategies for Infrared Photodetectors Based on Two‐Dimensional Materials

Xinlei Zhang, Ruizhi Li, Yuanfang Yu, Fuxing Dai et autres

Abstract Narrow‐bandgap 2D materials and semimetals, for example, graphene, black phosphorus (BP), tellurium (Te), and some novel transition metal dichalcogenides (TMDs), have been demonstrated to be promising building blocks for constructing next‐generation state‐of‐the‐art infrared (IR) photodetectors. However, these devices suffer from a …

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Anomalous Non-Equilibrium State Response of Long-Wavelength HgCdTe Infrared Detectors

Fuxing Dai, Fang Wang, Haonan Ge, Runzhang Xie et autres

Nowadays, long-wavelength infrared (LWIR) HgCdTe infrared detectors are developing towards high operating temperatures. There remains a lack of knowledge on the operational mechanism of LWIR HgCdTe at room temperature. This letter conducted an in-depth study on the anomalous non-equilibrium state of LWIR …

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