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We theoretically investigate refractive index sensors that are based on extraordinary optical transmission trough plasmonic nanoholes arranged in square and hexagonal lattices. The hexagonal system supports narrower spectral response and larger figure-of-merit values. Due its strong sensitivities, the hexagonal lattice also exhibits larger spectral shifts caused by a thin dielectric film which covers...
We calculate within a Bose–Hubbard tight-binding model the matter-wave flow driven by a constant force through a Bose–Einstein condensate of 87 Rb atoms in various types of quasi-onedimensional arrays of potential wells. Interference patterns are obtained when beam splitting is induced by creating energy minigaps either through period doubling or through quasi-periodicity governed by the Fibonacci...
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