The transmission properties of liquid surface waves through a biconvex array of rigid cylinders, arranged in a two-dimensional periodic lattice, are studied experimentally and numerically. Both experimental and numerical results show that this biconvex array of rigid cylinders can act as a lens, which can focus plane liquid surface waves in a wide range of frequencies.
Abstract. We study theoretically light propagations at the zigzag edge of a honeycomb photonic crystal consisting of dielectric rods in air, analogous to graphene. Within the photonic band gap of the honeycomb photonic crystal, a unimodal edge state may exist with a sharp confinement of optical fields. Its dispersion can be tuned simply by adjusting the radius of the edge rods. For the edge rods with a graded variation in radius along the edge direction, we show numerically that light beams of different frequencies can be trapped sharply in different spatial locations, rendering wideband trapping of light.
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