Deyi Fu

High-Performance AlGaN-Based UV-A Laser Diodes With Polarization-Modulated Superlattice Hole Injection and a Graded Electron-Blocking Layer

Xinyu Yang, Qilin Tan, Lingfang Yang, Deyi Fu et autres

Carrier imbalance—characterized by an electron-rich active region caused by limited hole injection—has long been a major challenge for AlGaN-based UV-A laser diodes, severely degrading their optoelectronic performance. In this work, we investigate AlGaN-based UV-A laser diodes emitting at approximately 358 nm and …

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A multi-graph convolution network with attention mechanism based on multi-modal data for ASD diagnosis

Lizhen Shao, Jian Hua Xiao, Kexin SHI, Deyi Fu

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Ultranarrow-Band DUV Detection Enabled by Plasmonic Coupled Nanohole Arrays in AlN/GaN Superlattices

Junxin Chen, Lingli Zhu, Yujie Gao, Xinyu Yang et autres

Precise signal identification in solar-blind deep-ultraviolet (DUV) detection critically relies on high-performance devices with exceptional spectral selectivity. A novel strategy is proposed to significantly enhance DUV photodetector performance by integrating plasmonic nanohole engineering with ultrashort-period AlN/GaN superlattices for ultranarrow-band detection. Simulations indicate …

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Dynamic Response Prediction of Wind Turbine Drive-Train Based on Mechanistic and Data Fusion

Ziying Song, Shupeng Sun, Guoying Li, Deyi Fu

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1700-V Enhancement-Mode MIS-HEMTs With Fully Recessed-Gate on 6-in GaN-on-Si Wafer

Yun Lei, Qingyuan Zuo, Nan Hai Sun, Xinyang Wang et autres

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Local avalanche photodetectors driven by lightning-rod effect and surface plasmon excitations

Zhao Fu, Jia‐Bao Liu, Jiafa Cai, Rongdun Hong et autres

Abstract Sensitive avalanche photodetectors (APDs) that operate within the ultraviolet spectrum are critically required for applications in detecting fire and deep-space exploration. However, the development of such devices faces significant challenges, including high avalanche breakdown voltage, the necessity for complex quenching circuits, …

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Electric field-tunable ferromagnetism in a van der Waals semiconductor up to room temperature

Deyi Fu, Jiawei Liu, Fuchen Hou, Xiao Chang et autres

Ferromagnetic semiconductors, coupling charge transport and magnetism via electrical means, show great promise for spin-based logic devices. Despite decades of efforts to achieve such co-functionality, maintaining ferromagnetic order at room temperature remains elusive. Here, we address this long-standing challenge by implanting dilute …

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Superior current spreading in InGaN green micro-LEDs achieved by hexagonal mesa engineering

Zelong Huang, Yujie Gao, Na Gao, Deyi Fu et autres

To address the challenge of low external quantum efficiency (EQE) in green micro-light-emitting diodes (micro-LEDs), we systematically investigated the effects of circular, square, and hexagonal mesa geometries. Through comprehensive fabrication and characterization, we demonstrate that the hexagonal mesa geometry significantly enhances device …

Spin-dependent signatures of induced magnetism in 2D materials

Tingyu Qu, Shangjian Jin, Deyi Fu, Fuchen Hou et autres

Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction, enables an electrical control of turning the ferromagnetic states ON and OFF in materials doped with dilute magnetic atoms. 2D materials provide a unique platform for RKKY interactions due to their high-gate tunability compared to their 3D counterparts. When …

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Localized Surface Plasmon Resonance‐Enhanced SiC UV Photodetectors Based on Ordered Al/Al 2 O 3 Core–Shell Nanoparticle Arrays

Zhiyuan Zhang, Yanan Hu, Zhao Fu, Zihao Li et autres

Abstract 4H‐SiC‐based ultraviolet (UV) photodetectors (PDs) are urgently required for applications in flame detection and secure communication. However, these devices are hindered by their low quantum efficiency properties and sluggish response speed. Here, a substantial enhancement in UV detection is implemented by …

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Oxygen plasma induced improvement of contact resistance and mobility of tellurium field-effect transistor

Jinwei Hu, Bosen Wang, Xingyun Li, Ming Yuwen et autres

Two-dimensional tellurium (Te) has been intensely studied in recent years due to its outstanding electrical properties and excellent air stability. Simple and effective contact engineering is highly desirable to further improve its device performance. In this work, we demonstrate a simple strategy …

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Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures

Shiming Huang, Yongxin Zhao, Kenji Watanabe, Takashi Taniguchi et autres

Information technology has a great demand for magnetoresistance (MR) sensors with high sensitivity and wide-temperature-range operation. It is well known that space charge inhomogeneity in graphene (Gr) leads to finite MR in its pristine form, and can be enhanced by increasing the …

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