期刊
ACS NANO
卷 7, 期 1, 页码 664-668出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn304855t
关键词
colloids; nanocavities; nanoparticles; charge image method; photonic interaction; metamaterials
类别
资金
- MICINN (Estancias de profesores e investigadores extranjeros en centros espanoles) fellowship program
- project Consolider 2007-0046 Nanolight
- [FIS2009-07812]
- [PRO-METEO/2010/043]
- ICREA Funding Source: Custom
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.
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