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Articles by Xiaohan Cui
Effect of printing layer thickness and sintering time on the densification, microstructure and mechanical properties of binder-jetted Ti-6Al-4V alloy Original
Abstract This study examines how printing layer thickness and sintering time jointly affect the densification, microstructure, and tensile behavior of binder-jetted Ti-6Al-4V under a fixed jetting strategy. Specimens were printed with layer thicknesses of 40, 80, and 120 μm and sintered at 1300 °C for 1–5 h. Reducing the layer thickness increased green density and refined the initial pore structure, thereby accelerating pore closure during early sintering.
Insulator-free topological photonic multi-lane highways
Abstract Topological protection in photonic structures enables robust unidirectional propagation immune to structural disorder1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. However, conventional implementations obtain this protection from topological-insulator domains whose interfaces host narrow guiding channels, leaving much of the insulating bulk inactive for transport. This imposes a fundamental trade-off between topological robustness and spatial footprint21,22,23,24,25.
ACSL3 inhibits ferroptosis in gastric cancer through the activation of unfolded protein response following endoplasmic reticulum stress
Abstract The long-chain acyl-CoA synthetase (ACSL) family has been associated with tumor progression across various cancer types. However, the function of the ACSL family in gastric cancer (GC) remains poorly understood. Comprehensive investigations employing in vivo and in vitro experiments demonstrate that ACSL3 suppresses ferroptosis and drives GC progression.
Bulk–spatiotemporal vortex correspondence in gyromagnetic zero-index media - Nature
Abstract Photonic double-zero-index media, distinguished by concurrently zero-valued permittivity and permeability, exhibit extraordinary properties not found in nature1,2,3,4,5,6,7,8. Notably, the notion of zero index can be substantially expanded by generalizing the constitutive parameters from null scalars to non-reciprocal tensors with non-zero matrix elements but zero determinants9,10.
Realization of Time-Reversal Invariant Photonic Topological Anderson Insulators
Disorder, which is ubiquitous in nature, has been extensively explored in photonics for understanding the fundamental principles of light diffusion and localization, as well as for applications in functional resonators and random lasers. Recently, the investigation of disorder in topological photonics has led to the realization of topological Anderson insulators characterized by an unexpected disorder-induced phase transition.
Physical Review Letters
Volume 132, Issue 22 31 May 2024 On the Cover Fluorescence microscope image from a video showing the dynamics of active nematics confined to a cardioid along with the tracks of three defects, which form a braid. Selected for an Editors’ Suggestion. From the article: Controlling Chaos: Periodic Defect Braiding in Active Nematics Confined to a Cardioid Fereshteh L. Memarian, Derek Hammar, Md Mainul Hasan Sabbir, Mark Elias, Kevin A. Mitchell, and Linda S. Hirst Phys. Rev. Lett. 132, 228301 (2024)
Topological Photonic Alloy
synopsis Recipe for a One-Way Waveguide Published 30 May 2024 Experiments and numerical simulations indicate that randomly replacing a few nonmagnetic components with magnetic ones in a photonic alloy induces backscattering-free light propagation along its edge. See more in Physics Click to Expand Article Text (Subscription Required) Click to Expand Supplemental Material (Subscription Required) Click to Expand Click to Expand
High-Precision and Real-Time Measurement of Water Isotope Ratios Based on a Mid-Infrared Optical Sensor
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High-Precision and Real-Time Measurement of Water Isotope Ratios Based on a Mid-Infrared Optical Sensor
Download Hi-Res ImageDownload to MS-PowerPointCite This:Anal. Chem. 2024, XXXX, XXX This article has not yet been cited by other publications.
Experimental Realization of Stable Exceptional Chains Protected by Non-Hermitian Latent Symmetries Unique to Mechanical Systems
Lines of exceptional points are robust in the three-dimensional non-Hermitian parameter space without requiring any symmetry. However, when more elaborate exceptional structures are considered, the role of symmetry becomes critical. One such case is the exceptional chain (EC), which is formed by the intersection or osculation of multiple exceptional lines (ELs).
Symmetry-protected topological exceptional chains in non-Hermitian crystals - Communications Physics
Author notes These authors contributed equally: Ruo-Yang Zhang and Xiaohan Cui. Authors and Affiliations Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China Ruo-Yang Zhang, Xiaohan Cui, Zhao-Qing Zhang & C. T. Chan School of Physics & State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275, China Wen-Jie Chen Contributions R.-Y.Z. and X.C. developed the theory. X.C. performed the numerical simulations.
Exceptional points and their coalescence of $\mathcal{PT}$-symmetric interface states in photonic crystals
Abstract The existence of surface electromagnetic waves in the dielectric-metal interface is due to the sign change of real parts of permittivity across the interface. In this work, we demonstrate that the interface constructed by two semi-infinite photonic crystals with different signs of the imaginary parts of permittivity also supports surface electromagnetic eigenmodes with real eigenfrequencies, protected by PT symmetry of the loss-gain interface.
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