研究目的
To study Maxwell’s equations in the domain that contains microstructures with periodically aligned, plasmonic hypersurfaces, aiming to design plasmonic crystals that enable the propagation of electromagnetic waves with no phase delay (epsilon-near-zero effect).
研究成果
The homogenization results provide a foundation for computational investigations of effective optical responses of reasonably general geometries and complicated design problems in the plasmonics of 2D materials. The effective permittivity tensor εeff can be controlled by tuning microscopic geometry, periodic spacing, frequency, and conductivities of the 2D material, enabling the epsilon-near-zero effect.
研究不足
The analysis leaves out boundary effects in the homogenization procedure due to the interaction of the microstructure with boundaries of the domain. It relies on a strong periodicity assumption for the microstructure and assumes a scale separation between the free-space wavenumber and the SPP wavenumber.