80 citations · 186 across the 15 of their papers we have counts for
15 papers
Categorize coalescing quasi-normal modes through far-field scattering patterns
Jingwei Wang, Yuntian Chen, Wei Liu
Resonances in the form of quasi-normal modes (QNMs) for open scattering systems can be generally identified in the far field through peaks of scattering spectra (\textit{e.g.} cros…
Quasi-normal modes empowered coherent control of electromagnetic interactions
Jingwei Wang, Pengxiang Wang, Chaofan Zhang +2
Quasi-normal modes (QNMs) and coherent control of light-matter interactions (through synchronized multiple coherent incident waves) are profound and pervasive concepts in and beyon…
Geometric Phase-Driven Scattering Evolutions
Pengxiang Wang, Yuntian Chen, Wei Liu
Conventional approaches for scattering manipulations rely on the technique of field expansions into spherical harmonics (electromagnetic multipoles), which nevertheless is non-gene…
Multi-Mode Optical Chirality Extremizations on Incident Momentum Sphere
Pengxiang Wang, Yuntian Chen, Wei Liu
We study the momentum-space evolutions for chiral optical responses of multi-mode resonators scattering plane waves of varying incident directions. It was revealed, in our previous…
Extremize Optical Chiralities through Polarization Singularities
Weijin Chen, Qingdong Yang, Yuntian Chen +1
Chiral optical effects are generally quantified along some specific incident directions of exciting waves (especially for extrinsic chiralities of achiral structures) or defined as…
Arbitrary Polarization-Independent Backscattering or Reflection by Rotationally-Symmetric Reciprocal Structures
Weijin Chen, Qingdong Yang, Yuntian Chen +1
We study the backward scatterings of plane waves by reciprocal scatterers and reveal that -fold () rotation symmetry is sufficient to secure invariant backscattering for…
Ideal Kerker scattering by homogeneous spheres: the role of gain or loss
Qingdong Yang, Weijin Chen, Yuntian Chen +1
We reexamine a recent work [Phys. Rev. Lett. \textbf{125}, 073205 (2020)] that investigates how the optical gain or loss (characterized by isotropic complex refractive indexes) inf…
Scattering invariance for arbitrary polarizations protected by joint spatial-duality symmetries
Qingdong Yang, Weijin Chen, Yuntian Chen +1
We reveal how to exploit joint spatial-electromagnetic duality symmetries to obtain invariant scattering properties (including extinction, scattering, absorption) of self-dual scat…
Symmetry Protected Invariant Scattering Properties for Arbitrary Polarizations
Qingdong Yang, Weijin Chen, Yuntian Chen +1
Polarization independent Mie scattering of building blocks is foundational for constructions of optical systems with robust functionalities. Conventional studies for such polarizat…
Scattering and absorption invariance of nonmagnetic particles under duality transformations
Qingdong Yang, Weijin Chen, Yuntian Chen +1
We revisit the total scatterings (in terms of extinction, scattering and absorption cross sections) by arbitrary clusters of nonmagnetic particles that support optically-induced ma…
Evolution and global charge conservation for polarization singularities emerging from nonhermitian degeneracies
Weijin Chen, Qingdong Yang, Yuntian Chen +1
Core concepts in singular optics, especially the polarization singularity, have rapidly penetrated the surging fields of topological and nonhermitian photonics. For open photonic s…
Electromagnetic Duality Protected Scattering Properties of Nonmagnetic Particles
Qingdong Yang, Weijin Chen, Yuntian Chen +1
Optical properties of nonmagnetic structures that support artificial optically-induced magnetic responses have recently attracted surging interest. Here we conduct symmetry-dictate…
Global Mie Scattering
Weijin Chen, Qingdong Yang, Yuntian Chen +1
In various subdisciplines of optics and photonics, Mie theory has been serving as a fundamental language and play indispensable roles widely. Conventional studies related to Mie sc…
Scattering Activities Bounded by Reciprocity and Parity Conservation
Weijin Chen, Qingdong Yang, Yuntian Chen +1
Scattering activities are generally manifest through different optical responses of scattering bodies to circularly polarized light of opposite handedness. Similar to the ubiquitou…
Planar Cassegrain-type Schwarzschild Objective with Optical Metasurfaces
Xuan Liu, Junhong Deng, King Fai Li +6
Curved reflective mirrors play an indispensable role in widely-employed Cassegrain-type optics, which consequently are inevitably bulky, and thus neither integratable nor well exte…