- by Jincheng Wen, Zhengyu Wang, Shihao Zhou, Bo Han, Lin Zhang and Xiuquan MaPrecise control of the recoil dynamics of laserāirradiated tin (Sn) microdroplets is crucial for optimizing extreme ultraviolet (EUV) laser-produced plasma sources. In dual-pulse operation, the preāpulse-induced recoil velocity determines the target position and shape for the main pulse, and thereby strongly affects conversion efficiency and debris generation. While the hydrodynamics of laser-droplet interaction have been extensively studied, explicit closed-form scaling laws that directly link pulse energy to recoil velocity in a form convenient for rapid engineering optimization require further development. […]
- by Yuxin Zhang and Yufeng ZhouFocused ultrasound (FUS) offers a noninvasive therapeutic modality for cardiac conditions, yet its transthoracic application is impeded by the rib cage, which induces strong reflection and scattering, severely degrading the focusing performance of conventional phased arrays. Non-diffraction waves such as Airy beams possess self-bending and self-healing capabilities that enable propagation past obstructions, but their focal position remains fixed. To overcome these limitations, we proposed a hybrid phase-weighted beamforming strategy that integrates cubic Airy phase modulation with time-delayed wavefront focusing, enabling […]
- by Bo Guo, Tianyou Zuo, Hua Yu, XiaoFeng Qian, Weijia Wen and Hua WeiThis study presents a hybrid pneumatic electrorheological (HPER) valve based on an airāliquid interface for electrically tunable pneumatic pressure regulation without mechanical actuation. In the proposed configuration, giant electrorheological fluid (GERF) functions as the electrically responsive control medium, while air serves as the working fluid. This separation combines the rapid, reversible field induced rheological response of GERF with the low flow resistance and efficient power transmission of pneumatic actuation. The valve was characterized under a constant air injection rate by […]
- by Baptist Elst and Ben MinnaertCoupled systems are utilized in various physical applications, including transformers, microwave filters, and wireless power transfer. Most of these applications are coupled either magnetically via magnetic fields or electrically via electric fields. To compare power transfer capabilities, the literature defines a magnetic coupling coefficient for magnetically coupled systems and an electric coupling coefficient for electrically coupled systems. These coefficients quantify power transfer capability based solely on the applicationās geometry. However, many applications involve both magnetic and electric coupling simultaneously, especially […]
- by Tao Shi, Ge Jin, Bowen Liu, Yuxin Chen, Yongjun Zhou, Junjian Tang and Sheng ZouEfficient production of hyperpolarized at clinically relevant output levels remains an important challenge for spin-exchange optical pumping (SEOP). In this work, we report a comparative experimental study of Csā Xe and Rbā Xe SEOP. The spin-exchange and spin-relaxation rates are measured and separated into binary-collision and van der Waals (vdW) molecular contributions. The resulting parameter set shows that long-lived vdW interactions enhance the intrinsic spin-exchange efficiency within a narrow pressure window, with Cs exhibiting a modest advantage over Rb under […]
- by Chenglin Li, Mingyong Xin, Jingran Chen, Jie Liu, Xin Li, Tao Wang and Caijiang LuA continuous power supply for wireless sensor nodes on transmission lines is essential for long-term condition monitoring in smart power networks. This work investigates the angle-dependent performance of a magneto-mechano-electric (MME) energy harvester for aluminium conductor steel reinforced (ACSR) conductors under ferromagnetic bias. The influences of four representative magnet angles (ā45Ā°, 0Ā°, 45Ā°, and 90Ā°) and harvester position on the resonant behavior and electrical output are experimentally investigated. The results show that, among the tested configurations, the harvester achieves the […]
- by Yaokai Yu, Dongyang Wu, Shijian Tan, Zhaoxing Wang, Quanhan Mao, Shiwei Deng, Xiaorui Liang, Rui Feng and Qiulin TanConventional metasurfaces are frequently constrained by single-functionality and limited integration capabilities, hindering their application in emerging 5 G/6 G communications and intelligent sensing scenarios that demand multifunctionality, lightweight design, and high compatibility. To address these challenges, we propose a transmissive-reflective dual-functional metasurface based on a hexagonal unit cell architecture. Within the operating frequency band, this metasurface achieves full phase coverage in the reflection domain for x-polarized waves and in the transmission domain for y-polarized waves, respectively. The dual-functional capability is […]
- by Zhenghua Wang, Jiuqi Luo, Kui Fan, Zihan Zhang, Guibao Wang, Miao Yu, Bo Peng, Jichao Hu, Lejia Sun, Yuming Zhang, Lei Yuan and Renxu JiaThis work reports the electrical properties of Ga2O3 quasi JBS diodes fabricated via F (Fluorine) -ion implantation. The JBS diodes incorporating edge termination and field-limiting rings (FLRs) demonstrate a reverse leakage current reduced by nearly three orders of magnitude compared to Schottky barrier diodes, the breakdown voltages (BVs) of JBS diodes with FLRs exceeds 2000 V. The leakage current increases and the BV decreases respectively as the proportion of F implantation decreases. Correspondingly, the reverse breakdown mechanism gradually transitions from […]
- by Mingbin Peng, Yongsheng Wang, Jiahe Liang, Jialin Song, Haorui Xue, Qi Yuan, Dong Yang, Xinyu Zhang and Yang MengAtmospheric-pressure glow discharge (APGD) driven by alternating current (AC) has attracted considerable attention for environmental and plasma-assisted applications. However, the discharge-development process and mode-transition behavior of AC-driven APGD remain insufficiently understood. In this work, the temporal evolution and mode-transition characteristics of an AC-driven APGD generated in a needle-to-plate electrode configuration by a self-current-limiting resonant power supply are systematically investigated. Time-resolved intensified charge-coupled device imaging, synchronized electrical measurements, and optical emission spectroscopy are employed to characterize the discharge dynamics under different […]
- by Qianghua Yuan, Zilong Sun, Lulu Ma, Zhanhui Gao, Guiqin Yin and Liang ZhangThe discharge characteristics of low-pressure dual-frequency (DF) (13.56/40.68 MHz) capacitively coupled argon plasma were investigated using a comprehensive modeling framework that integrates an 18-level collisional-radiative model (CRM) with a nonlinear global model (NGM). Electron temperature ( ) and electron density ( ) at 60 mTorr were retrieved from calibrated Ar I emission lines at 750.4 and 696.5 nm using the CRM. These CRM-derived electron temperatures and electron densities were subsequently incorporated into the NGM as input parameters to simulate plasma […]
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