377 citations · 1.6k across the 33 of their papers we have counts for
9 papers · 1 filter
Realization and Topological Properties of Third-Order Exceptional Lines Embedded in Exceptional Surfaces
Weiyuan Tang, Kun Ding, Guancong Ma
As the counterpart of Hermitian nodal structures, the geometry formed by exceptional points (EPs), such as exceptional lines (ELs), entails intriguing spectral topology. We report…
Exceptional Non-Abelian Topology in Multiband Non-Hermitian Systems
Cui-Xian Guo, Shu Chen, Kun Ding +1
Defective spectral degeneracy, known as exceptional point (EP), lies at the heart of various intriguing phenomena in optics, acoustics, and other nonconservative systems. Despite e…
Exceptional points make an astroid in non-Hermitian Lieb lattice: evolution and topological protection
Yi-Xin Xiao, Kun Ding, Ruo-Yang Zhang +2
An astroid-shaped loop of exceptional points (EPs), comprising four cusps, is found to spawn from the triple degeneracy point in the Brillouin zone (BZ) of a Lieb lattice with near…
Casimir induced instabilities at metallic surfaces and interfaces
Kun Ding, Daigo Oue, C. T. Chan +1
Surface plasmons subject to a surface distortion split asymmetrically in energy resulting in a net lowering of zero-point energy. This is because surface plasmon eigenvalues are th…
Experimental observation of exceptional surface in synthetic dimensions with magnon polaritons
Xufeng Zhang, Kun Ding, Dafei Jin +2
Exceptional points (EPs) are singularities of energy levels in non-Hermitian systems. In this Letter, we demonstrate the surface of EPs on a magnon polariton platform composed of c…
An eigenvalue approach to quantum plasmonics based on a self-consistent hydrodynamics method
Kun Ding, C. T. Chan
Plasmonics has attracted much attention not only because it has useful properties such as strong field enhancement, but also because it reveals the quantum nature of matter. To han…
Nano-corrugation induced forces between electrically neutral plasmonic objects
Kun Ding, Han Hu, T. C. Leung +1
Recent advances in nanotechnology have created tremendous excitement across different disciplines but in order to fully control and manipulate nano-scale objects, we must understan…
Plasmonic modes of polygonal particles calculated using a quantum hydrodynamics method
Kun Ding, C. T. Chan
Plasmonic resonances of nanoparticles have drawn lots of attentions due to their interesting and useful properties such as strong field enhancements. These systems are typically st…
The emergence, coalescence and topological properties of multiple exceptional points and their experimental realization
Kun Ding, Guancong Ma, Meng Xiao +2
Non-Hermitian systems distinguish themselves from Hermitian systems by exhibiting a phase transition point called an exceptional point (EP), which is the point at which two eigenst…