Results 251 to 260 of about 1,200,672 (302)

Sphere of arbitrarily polarized exceptional points with a single planar metasurface. [PDF]

Nat Commun
Qin H, Yang Z, Huang PS, Mu X, Huang SH, Shi Y, Zhao W, Li B, Zhou J, Zúñiga-Pérez J, Genevet P, Wu PC, Song Q.   +12 more
europepmc   +1 more source

High-Density Topological Defect Array by Two-Step Interference Photoalignment. [PDF]

Adv Mater
Liu S, Nys I, Neyts K.
europepmc   +1 more source

Programming chaotic centers for shaping light branching in topological nematic vortices. [PDF]

Sci Adv
Yu X, Xu R, Tie ZX, Wang ZY, Ma LL, Meng C, Li BX, Lu YQ.   +7 more
europepmc   +1 more source

Pomeranchuk instability from electronic correlations in CsTi₃Bi₅ kagome metal. [PDF]

Nat Commun
Bigi C, Dürrnagel M, Klebl L, Consiglio A, Pokharel G, Zonno M, Bertran F, Le Fèvre P, Jaouen T, Tchouekem HC, Turban P, De Vita A, Miwa JA, Wells JW, Oh D, Comin R, Thomale R, Zeljkovic I, Ortiz BR, Wilson SD, Sangiovanni G, Mazzola F, Di Sante D.   +22 more
europepmc   +1 more source

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Polarization Singularities of Photonic Quasicrystals in Momentum Space.

Physical Review Letters, 2021
We report the observation of polarization singularities in momentum space of 2D photonic quasicrystal slabs. Supercell approximation and band-unfolding approach are applied to obtain approximate photonic dispersions and the far-field polarization states ...
Zhiyuan Che, Yanbin Zhang, Wenzhe Liu, Maoxiong Zhao, Jiajun Wang, Wenjie Zhang, Fang Guan, Xiaohan Liu, Wei Liu, Lei Shi, Jian Zi   +10 more
semanticscholar   +3 more sources

Directional Chiral Exciton Emission via Topological Polarization Singularities in all Van der Waals Metasurfaces

Advanced Materials
Monolayer transition metal dichalcogenides (TMDs) with strong exciton effects have enabled diverse light emitting devices, however, their Ångstrom thickness makes it challenging to efficiently manipulate exciton emission by themselves.
Yuefeng Wang, Di Huang, Meng Xia, Jiaxin Zhou, Yuhua Chen, Yinchang Liao, Xingwang Zhang   +6 more
semanticscholar   +3 more sources

Polarization singularities of random partially coherent electromagnetic beams in atmospheric turbulence

Optics and Laser Technology, 2018
A transverse-longitudinal cross-spectral density matrix of partially coherent electromagnetic beams was proposed, and polarization singularities of random partially coherent electromagnetic beams can be applied to study with this cross-spectral density ...
Jianlong Li
semanticscholar   +3 more sources

Dynamics of diverse polarization singularities in momentum space with far-field interference

Physical Review A, 2023
Polarization singularities in momentum space, including bound states in the continuum (BICs) and circularly polarized states (CPSs), render great potential in singular and chiral optics.
Haoqi Luo, Liangliang Liu, Z. Xi, Yonghua Lu, Peibiao Wang   +4 more
semanticscholar   +1 more source

Magnetic modulation of topological polarization singularities in momentum space.

Optics Letters, 2022
The polarization singularities in momentum space, rather than in real space, are capturing interest for active singular optics with exotic light scattering and various topological phenomena, which have potential applications in vortex nano-lasers, valley
Guangwei Hu, Shaohua Dong, Chen Zhao, Qing Zhang, Yixuan Zeng, Yongzhe Zhang   +5 more
semanticscholar   +1 more source

Polarization degree singularities

SPIE Proceedings, 2009
New type of vector singularities inherent in partially coherent combined beams is explored. There are the polarization degree singularities, such as U (unpolarized) and P (completely polarized) elements of a field. The fundamental properties of such singularities are derived for the general case of elliptical polarization basis using the notion ...
Peter V. Polyanskii, Christina V. Felde, Alex A. Chernyshov   +2 more
openaire   +1 more source