Results 171 to 180 of about 94,440 (338)

Ellipticity‐Controlled Exceptional Points and Cross‐Polarized Phase Singularities in Multi‐Layer Silicon Guided Mode Resonant Metasurfaces

open access: yesAdvanced Optical Materials, EarlyView.
Omni‐polarizers that pull all input polarization states to an elliptical or linear polarization can be made using highly resonant bi‐layer metasurfaces. The ellipticity of the selected polarization can be controlled by choosing the layer separation.
Ben Goldberg   +2 more
wiley   +1 more source

On dynamical chiral symmetry breaking

open access: yesPhysics Letters B, 1985
Abstract It is shown, in contrast with the affirmations of some recent papers, that the dynamical mass function of quarks in QCD has ultraviolet asymptotics of the regular type.
openaire   +2 more sources

A Switchable and Rotatable Chiral Nematic Liquid Crystal Diffraction Grating for Beam‐Steering Technology

open access: yesAdvanced Optical Materials, EarlyView.
A switchable and rotatable chiral nematic liquid crystal diffraction grating is demonstrated, driven by low voltages at room temperature. Incorporation of the dimer CB7CB induces an asymmetric tilt via the flexoelectro‐optic effect, generating torque that enables uniform 360° in‐plane rotation of both the grating and its far‐field diffraction pattern ...
Qihao Han   +4 more
wiley   +1 more source

Fabrication Optimization of van der Waals Metasurfaces: Inverse Patterning Boosts Resonance Quality Factor

open access: yesAdvanced Optical Materials, EarlyView.
An optimized fabrication approach for the nanostructuring of optical metasurfaces from van der Waals materials like hexagonal boron nitride is presented. The resonator geometries show enhanced geometric homogeneity, resulting in a significant increase in quality factors of symmetry‐protected bound states in the continuum resonances.
Jonas Biechteler   +7 more
wiley   +1 more source

SCHWINGER–DYSON EQUATIONS AND CHIRAL SYMMETRY BREAKING IN 2-D INDUCED GRAVITY [PDF]

open access: green, 1995
E. Elizalde   +3 more
openalex   +1 more source

Dynamical chiral symmetry breaking

open access: yesPhysics Letters B, 1985
Abstract It is shown that the Dyson-Schwinger equation for massless quarks determines the asymptotic form of the chiral symmetry breaking part of the quark self-energy. Using this form to calculate the effective potential it is found that massless QCD exhibits dynamical chiral symmetry breaking.
openaire   +2 more sources

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