Kelvin's Chirality of Optical Beams

Abstract

Geometrical chirality is a property of objects that describes three-dimensional mirror-symmetry violation and therefore it requires a non-vanishing spatial extent. In contrary, optical chirality describes only the local handedness of electromagnetic fields and neglects the spatial geometrical structure of optical beams. In this manuscript, we put forward the physical significance of geometrical chirality of spatial structure of optical beams, which we term "Kelvin's chirality". Further, we report on an experiment revealing the coupling of Kelvin's chirality to optical chirality upon transmission of a focused beam through a planar medium. Our work emphasizes the importance of Kelvin's chirality in all light-matter interaction experiments involving structured light beams with spatially inhomogeneous phase and polarization distributions.

6 pages, 3 figures

References in corpus (7)

• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Chiral Quantum Optics
• Characterizing optical chirality
• Chirality and angular momentum in optical radiation
• Orbital-to-Spin Angular Momentum Conversion Employing Local Helicity
• Mimicking Chiral Light-Matter Interaction
• Non-zero helicity extinction in light scattered from achiral (or chiral) small particles located at points of null incident helicity density

Cited by in corpus (2)

• Optical helicity of unpolarized light
• Measures of Helicity and Chirality of Optical Vortex Beams