Polarization singularities: Progress, fundamental physics, and prospects
APL Photonics, 2021 Polarization singularities, describing the points where the state of polarization is indeterminate, reveal the polarization topology in vectorial optical fields, which include two-/three-dimensional topologies such as C-points, V-points, L-lines, Möbius ...
Qiang Wang +3 more
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Fundamentals and Applications of Topological Polarization Singularities
Frontiers in Physics, 2022 Radiations towards the continuum not only brings non-Hermicity to photonic systems but also provides observable channels for understanding their intrinsic physics underneath.
Feifan Wang +10 more
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Extremize Optical Chiralities through Polarization Singularities. [PDF]
Physical Review Letters, 2021 Chiral optical effects are generally quantified along some specific incident directions of exciting waves (especially for extrinsic chiralities of achiral structures) or defined as direction-independent properties by averaging the responses among all ...
Weijin Chen +3 more
semanticscholar +5 more sources
Evolution and global charge conservation for polarization singularities emerging from non-Hermitian degeneracies [PDF]
Proc Natl Acad Sci U S A, 2020 Significance Relying on a two-level Hamiltonian with an extra chirality term, we establish subtle connections between Berry phase defined for near-field Bloch modes in open photonic crystal slabs and polarization singularities of their far-field ...
Weijin Chen +3 more
semanticscholar +2 more sources
Singularities of Partially Polarized Vortex Beams [PDF]
Frontiers in Physics, 2020 Singularities in the polarization state of non-uniform electromagnetic beams have been a topic of both theoretical and practical interest for many years, as have singularities in the correlation functions of random scalar wavefields.
William Scott Raburn, Greg Gbur
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Observation of Polarization Singularities and Topological Textures in Sound Waves. [PDF]
Physical Review Letters, 2022 Polarization singularities and topological polarization structures are generic features of inhomogeneous vector wave fields of any nature. However, their experimental studies mostly remain restricted to optical waves.
Ruben D. Muelas-Hurtado +6 more
semanticscholar +3 more sources
Electrically Tunable Momentum Space Polarization Singularities in Liquid Crystal Microcavities [PDF]
Advanced ScienceMomentum space polarization singularities of light appear as vectorial twists in the scattered and radiated far field patterns of exotic photonic structures.
Przemysław Oliwa +12 more
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Polarization singularities from unfolding an optical vortex through a birefringent crystal [PDF]
Physical Review Letters, 2005 Optical vortices (nodal lines and phase singularities) are the generic singularities of scalar optics but are unstable in vector optics. We investigate experimentally and theoretically the unfolding of a uniformly polarized optical vortex beam on ...
Dennis, Mark R. +3 more
core +6 more sources
Polarization singularities and Möbius strips in sound and water-surface waves [PDF]
Physics of Fluids, 2021 We show that polarization singularities, generic for any complex vector field but so far mostly studied for electromagnetic fields, appear naturally in inhomogeneous yet monochromatic sound and water-surface (e.g., gravity or capillary) wave fields in ...
K. Bliokh +5 more
semanticscholar +3 more sources
Polarization singularities of focused, radially polarized fields [PDF]
Frontiers in Optics, 2006 The state of polarization of strongly focused, radially polarized electromagnetic fields is examined. It is found that several types of polarization singularities exist. Their relationship is investigated, and it is demonstrated that on smoothly varying a system parameter, such as the aperture angle of the lens, different polarization singularities can
Schoonover, R. W., Visser, T.D.
openaire +4 more sources