Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Topological spin structures of light, including the Skyrmion, Meron, and bi-Meron, are intriguing optical phenomena that arise from spin-orbit coupling. They have promising potential applications in nano-metrology, data storage, super-resolved imaging and chiral detection. Aside from the electric part of optical spin, of equal importance is the magnetic part, particularly the H-type electromagnetic modes for which the spin topological properties of the field are dominated by the magnetic field. However, their observation and measurement remains absent and faces difficult challenges. Here, we design a unique type of anapole probe to measure specifically the photonic spin structures dominated by magnetic fields. The probe is composed of an Ag-core and Si-shell nanosphere, which manifests as a pure magnetic dipole with no electric response. The effectiveness of the method was validated by characterizing the magnetic field distributions of various focused vector beams. It was subsequently employed to measure the magnetic topological spin structures, including individual Skyrmions and Meron/Skyrmion lattices for the first time. The proposed method may be a powerful tool to characterize the magnetic properties of optical spin and valuable in advancing spin photonics.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9537154 | PMC |
| http://dx.doi.org/10.1038/s41377-022-00970-x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Probing the Kitaev honeycomb model on a neutral-atom quantum computer.
Nature
September 2025
Department of Physics, Harvard University, Cambridge, MA, USA.
Quantum simulations of many-body systems are among the most promising applications of quantum computers. In particular, models based on strongly correlated fermions are central to our understanding of quantum chemistry and materials problems, and can lead to exotic, topological phases of matter. However, owing to the non-local nature of fermions, such models are challenging to simulate with qubit devices.
View Article and Find Full Text PDFOrdering and Defect Cloaking in Nonreciprocal Lattice XY Models.
Phys Rev Lett
August 2025
Indian Institute of Science, Centre for Condensed Matter Theory, Department of Physics, Bengaluru 560 012, India.
We present a detailed analytical and numerical examination, on square and triangular lattices, of the nonreciprocal planar spin model introduced in Dadhichi et al. [Phys. Rev.
View Article and Find Full Text PDFSpace-Time Optical Hopfion Crystals.
Phys Rev Lett
August 2025
The University of Tokyo, Research Center for Advanced Science and Technology, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan.
Hopfions-higher-dimensional topological quasiparticles with sophisticated 3D knotted spin textures discovered in condensed matter and photonic systems-show promise in high-density data storage and transfer. Here, we present crystalline structures of hopfions lying in space-time constructed by spatiotemporally structured light. Practical methodologies using bichromatic structured light beams or dipole arrays to assemble 1D and higher dimensional hopfion lattices are proposed, and a technique for tailoring topological orders is elucidated.
View Article and Find Full Text PDFProgrammable All-Optical Spin Simulator with Artificial Gauge Fields.
Phys Rev Lett
August 2025
Weizmann Institute of Science, Department of Physics of Complex Systems, Rehovot 761001, Israel.
The coupling of lasers plays an important role in a variety of research activities, from generating high-power lasers to investigating out-of-equilibrium coupled systems. This Letter presents our investigations of Hermitian coupling in arrays of lasers, where it is possible to control both the amplitude and phase of the coupling and generate artificial gauge fields. The Hermitian coupling is demonstrated in three laser array geometries: a square array of 100 lasers with controlled laser coupling for obtaining continuous control over the phase-locked state, a triangular array of 130 lasers with controlled chirality of the lasers, and a ring array of eight lasers with a controlled topological charge.
View Article and Find Full Text PDFExtracting Topological Spins from Bulk Multipartite Entanglement.
Phys Rev Lett
August 2025
Weizmann Institute of Science, Department of Condensed Matter Physics, Rehovot 7610001, Israel.
We address the problem of identifying a 2+1D topologically ordered phase using measurements on the ground-state wave function. For nonchiral topological order, we describe a series of bulk multipartite entanglement measures that extract the invariants ∑_{a} d_{a}^{2}θ_{a}^{r} for any r≥2, where d_{a} and θ_{a} are the quantum dimension and topological spin of an anyon a, respectively. These invariants are obtained as expectation values of permutation operators between 2r replicas of the wave function, applying different permutations on four distinct regions of the plane.
View Article and Find Full Text PDF