Mirror-image-induced magnetic modes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 23194368.
- Also identified by DOI 10.1021/nn304855t.
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Abstract
Reflection in a mirror changes the handedness of the real world, and right-handed objects turn left-handed and vice versa (M. Gardner, The Ambidextrous Universe, Penguin Books, 1964). Also, we learn from electromagnetism textbooks that a flat metallic mirror transforms an electric charge into a virtual opposite charge. Consequently, the mirror image of a magnet is another parallel virtual magnet as the mirror image changes both the charge sign and the curl handedness. Here we report the dramatic modification in the optical response of a silicon nanocavity induced by the interaction with its image through a flat metallic mirror. The system of real and virtual dipoles can be interpreted as an effective magnetic dipole responsible for a strong enhancement of the cavity scattering cross section.
Medical subject headings
- Lenses
- Models, Theoretical
- Nanostructures
- Silicon