Dual and chiral objects for optical activity in general scattering directions

Abstract

Optically active artificial structures have attracted tremendous research attention. Such structures must meet two requirements: Lack of spatial inversion symmetries and, a condition usually not explicitly considered, the structure shall preserve the helicity of light, which implies that there must be a vanishing coupling between the states of opposite polarization handedness among incident and scattered plane waves. Here, we put forward and demonstrate that a unit cell made from chiraly arranged electromagnetically dual scatterers serves exactly this purpose. We prove this by demonstrating optical activity of such unit cell in general scattering directions.

arXiv commentThis document is the unedited Authors version of a Submitted Work that was subsequently accepted for publication in ACS Photonics, copyright American Chemical Society after peer review. To access the final edited and published work see http://pubs.acs.org/articlesonrequest/AOR-3yvzAibCIU6wdTuzx9cE

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Cited by in corpus (16)

• Objects of maximum electromagnetic chirality
• Achiral, Helicity Preserving, and Resonant Structures for Enhanced Sensing of Chiral Molecules
• Extremize Optical Chiralities through Polarization Singularities
• Exact dipolar moments of a localized electric current distribution
• Computation of electromagnetic properties of molecular ensembles
• Optical Force and Torque on Dipolar Dual Chiral Particles
• Core-shell particles as building blocks for systems with high duality symmetry
• Unveiling dipolar spectral regimes of large dielectric Mie spheres from helicity conservation
• Experimental demonstration of spectrally-broadband Huygens sources using low-index spheres
• Momentum-space geometric structure of helical evanescent waves and its implications on near-field directionality
• Broadband suppression of backscattering at optical frequencies using low permittivity dielectric spheres
• On the conservation of helicity in a chiral medium
• Optical Chirality of Time-Harmonic Wavefields for Classification of Scatterers
• Spontaneous natural optical activity in disordered media
• Electromagnetic Duality Symmetry-Protected Dirac-Like Cones
• Circular Dichroism without absorption in isolated chiral dielectric Mie particles