Constructing a chiral dipolar mode in an achiral nanostructure

Abstract

We discuss the excitation of a chiral dipolar mode in an achiral silicon nanoparticle. In particular, we make use of the electric and magnetic polarizabilities of the silicon nanoparticle to construct this chiral electromagnetic mode which is conceptually similar to the fundamental modes of 3D chiral nanostructures or molecules. We describe the chosen tailored excitation with a beam carrying neither spin nor orbital angular momentum and investigate the emission characteristics of the chiral dipolar mode in the helicity basis, consisting of parallel electric and magnetic dipole moments, phase shifted by $\pm \pi /2$. We demonstrate the wavelength dependence and measure the spin and orbital angular momentum in the emission of the excited chiral mode.

6 pages, 3 figures

References in corpus (5)

• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Directional visible light scattering by silicon nanoparticles
• Janus and Huygens' dipolar sources for near-field directionality
• Conservation of the spin and orbital angular momenta in electromagnetism
• Adding a spin to Kerker's condition: arbitrary scattering direction tuning of nano-antennas with designed excitation

Cited by in corpus (22)

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• Orbital-to-Spin Angular Momentum Conversion Employing Local Helicity
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• Controlling the broadband enhanced light chirality with L-shaped dielectric metamaterials
• Optimally Chiral Electromagnetic Fields: Helicity Density and Interaction of Structured Light with Nanoscale Matter
• Unveiling dipolar spectral regimes of large dielectric Mie spheres from helicity conservation
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• Helicity Maximization Below the Diffraction Limit
• Helicity Maximization of Structured Light to Empower Nanoscale Chiral Matter Interaction
• Lateral Optical Forces on Linearly-Polarized Emitters near a Reciprocal Substrate
• Influence of resonant plasmonic nanoparticles on optically accessing the valley degree of freedom in 2D semiconductors
• The Azimuthally-Radially Polarized Beam: Helicity and Momentum Densities, Generation and Optimal Chiral Light
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• Spatially resolving amplitude and phase of light with a reconfigurable photonic integrated circuit
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