All-dielectric metasurface filters for mid-infrared rangeстатья
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Дата последнего поиска статьи во внешних источниках: 14 февраля 2019 г.
Аннотация:In the present work, a metasurface composed of PbTe spherical particles and located on Ge substrate is considered. We show that it acts in two anti-reflective regimes: depending on geometrical parameters of the structure, it can be a narrow or a wide-range filter. The reason is that the incident radiation excites different dipole resonances of the metasurface. For high-index dielectric materials, we obtain conditions for the validity and accuracy of the dipole approximation and the locations of dipole magnetic and electric resonances.