Spontaneous natural optical activity in disordered media
arXiv:1610.08432 · doi:10.1103/PhysRevB.95.220201
Abstract
We demonstrate natural optical activity in disordered ensembles of non-chiral plasmonic resonators. We show that the statistical distributions of rotatory power and spatial dichroism are strongly dependent on the scattering mean free path in diffusive random media. This result is explained in terms of the intrinsic geometric chirality of disordered media, as they lack mirror symmetry. We argue that chirality and natural optical activity of disordered systems can be quantified by the standard deviation of both rotatory power and spatial dichroism. Our results are based on microscopic electromagnetic wave transport theory coupled to vectorial Green's matrix method for pointlike scatterers, and are independently confirmed by full-wave simulations.
5 pages, 5 figures
References in corpus (7)
- 3D-Chiral Metamaterial Showing Artificial Magnetic Response and Negative Refraction
- Giant gyrotropy due to electromagnetic coupling
- Cooperative effects and disorder: A scaling analysis of the spectrum of the effective atomic Hamiltonian
- Coherent control of nanoscale light localization in metamaterial: creating and positioning a sub-wavelength energy hot-spot
- Magnetic-field-driven localization of light in a cold-atom gas
- Dual and chiral objects for optical activity in general scattering directions
- Polarization-resolved extinction and scattering cross-section of individual gold nanoparticles measured by wide-field microscopy on a large ensemble
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