Abstract
We examine the Kramers-Kronig relations between the circular dichroism and the optical rotation dispersion in the k-space obtained from a chiral metasurface with a reduced rotational symmetry. We operate a leakage-radiation microscopy system to probe the near-field plasmonic modes and measure the polarization effects of the grating. By using our system we were able to capture and analyze the plasmonic modes at both air/gold and gold/glass interfaces. The k-space mapping of the chirality parameters allows us to fully analyze the optical activity of the metasurface. We experimentally find that the reduction in rotational symmetry affects the locality condition which unavoidably leads to the deviation from the Kramers-Kronig relation.
Original language | English |
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Article number | 12LT01 |
Journal | Journal of Optics (United Kingdom) |
Volume | 22 |
Issue number | 12 |
DOIs | |
State | Published - 1 Dec 2020 |
Keywords
- chiral materials
- metasurfaces
- nanophotonics
- plasmonics
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics