Coupled-cavity-based slow light metamaterials with antireflection structures

A slow lightmetamaterial based on a coupled Fabry-P érotcavity is proposed and numerically studied usingfinite-difference time-domain simulations. The coupled cavity-based slow lightmetamaterial is composed of a periodic array of partialmirrors with low transmittance, i.e., thin metalfilms perforated with a subwavelength hole array. The tight-binding model is employed to investigate the transmission properties of the coupled-cavity-basedmetamaterial. It is shown that the group velocities of the slowly propagating modes can be controlled by adjusting the radius of holes in themirrors. We also show that undesirable reflections at the boundaries of the finite-sizemetamaterial can be minimized by introducing optimized antireflectionstructures.

Source: Applied Physics Letters - November 29, 2016 Category: Physics Authors: Sun-Goo Lee, Seong-Han Kim, Soo-Yong Jung, Jongjin Lee, Jong-Moon Park and Chul-Sik Kee Source Type: research