SECUF Supports Research on Destructive Interference-Driven Topological Charge Jumping in Bilayer Optical Metasurfaces
Recently, the microfabrication laboratory technical team at the Synergetic Extreme Condition User Facility (SECUF), Institute of Physics, Chinese Academy of Sciences, designed and prepared a bilayer titanium dioxide optical metasurface with triple rotational symmetry. By simply adjusting the spacer layer thickness between the two metasurface layers, direct induction of bound states in the continuum (BIC) topological charge jumping from low-order to high-order can be achieved without breaking structural symmetry. This work represents the first realization of symmetry-preserving dynamic manipulation of BIC topological charge in optical metasurfaces, breaking through the inherent concept that topological properties must be regulated by breaking symmetry, and providing a new approach for exploring novel topological optical properties of optical metasurfaces. Related research findings have been published in Physical Review Letters.
Source: Institute of Physics, Chinese Academy of Sciences
Institute of Physics Realizes Significantly Enhanced Superconducting Diode Effect Driven by Non-Uniform Antiferromagnetic Proximity Effect
Recently, the Institute of Physics, Chinese Academy of Sciences, and other institutions, relying on the Synergetic Extreme Condition User Facility (SECUF), realized a significantly enhanced superconducting diode effect (SDE) driven by non-uniform antiferromagnetic proximity effect in NbSe2/MnPS3 heterostructures constructed from van der Waals layered materials. The extreme low temperature, ultra-low electromagnetic noise, and pristine measurement environment provided by the C1 Sub-millikelvin Experimental Station and C4 Electron Spectroscopy Experimental Station of the Synergetic Extreme Condition User Facility (SECUF) are essential conditions for detecting such weak quantum signals. The findings open new pathways for developing superconducting rectification devices based on two-dimensional material heterostructures that can be integrated into low-power quantum circuits, and also provide an ideal platform for exploring non-reciprocal transport phenomena in vortex matter. The findings have been published in Physical Review Applied.
Source: Synergetic Extreme Condition User Facility (SECUF)
Institute of Process Engineering Reveals Mechanism of Water Droplet-Driven Detachment of Super-Heavy Particles
Recently, Professor Steven Wang from City University of Hong Kong, in collaboration with CAE member Yang Chao from the Institute of Process Engineering, Chinese Academy of Sciences, and others, constructed an experimental system of droplet impact on particles on a superhydrophobic substrate and conducted systematic research on droplet-particle interactions. The study found that when a droplet of approximately 5μL impacts a single particle on the surface, under appropriate conditions, the droplet does not simply push the particle away from its original position, but rather wraps around and lifts the particle during the retraction phase, ultimately promoting particle detachment from the substrate. For processes that rely on droplets to achieve particle migration, surface renewal, or contaminant removal, this work provides a new analytical framework and offers a physical foundation for spray process optimization, wetting behavior regulation, and functional interface design. Related findings have been published in Nature Sustainability.
Source: Institute of Process Engineering, Chinese Academy of Sciences
Institute of High Energy Physics Releases UNICS 1.0, Driving Large Research Infrastructure Control Systems Toward a New Paradigm of Intelligent Collaboration
Recently, UNICS 1.0, an integrated intelligent control system for complex scenarios in large-scale particle accelerators, jointly developed by the Control System Team of the Accelerator Technology Division at the Dongguan Research Division of the Institute of High Energy Physics, Chinese Academy of Sciences, and the Jiao Yi Team from the Accelerator Center, was officially released and deployed and verified in the operating environment of the China Spallation Neutron Source. UNICS takes natural interaction and intelligent decision-making as its core concepts, building efficient and intuitive human-machine interaction methods through intelligent agent technology. Based on a unified platform and intelligent interaction, UNICS is driving operational data transformation from "passive storage" to "active understanding and organization," exploring the formation of a new data and model-driven operation and maintenance management paradigm, and providing an important practical foundation for building intelligent control systems with higher autonomy and collaboration capabilities.
Source: Institute of High Energy Physics, Chinese Academy of Sciences
Peking University School of Physics Observes Quasi-One-Dimensional Magnon Spin Transport Phenomenon in Two-Dimensional Spin Lattices for the First Time
Recently, the team led by Chen Jianhao from the School of Physics at Peking University and the Interdisciplinary Institute of Light-Elements Quantum Materials (LEQM) achieved a major breakthrough—observing for the first time in the two-dimensional frustrated stripe antiferromagnet CrOCl the quasi-one-dimensional long-range magnon spin transport phenomenon caused by magnon flat bands, laying an important foundation for large-scale integration of novel magnon devices. With the miniaturization and integration development of next-generation spintronic devices, studying one-dimensional magnon spin transport can effectively avoid signal crosstalk between neighboring devices caused by increased device integration density. This research reveals the potential of two-dimensional materials in constructing novel atomic-scale magnetic structures and realizing one-dimensional magnon spin transport, which is of great significance for large-scale integration of magnon devices. Related findings have been published online in Nature Communications.
Source: Interdisciplinary Institute of Light-Elements Quantum Materials (LEQM)