Monday, May 4, 2015
Abstract-Tailoring the slow light behavior in terahertz metasurfaces
We experimentally study the effect of near field coupling on the transmission of light in terahertz metasurfaces. Our results show that tailoring the coupling between the modulates the amplitude of resulting induced transmission, probed under different types of asymmetries in the coupled system. Observed change in the transmission amplitude is attributed to the change in the amount of destructive interference between the in the vicinity of strong near field coupling. We employ a two-particle model to theoretically study the influence of the coupling between bright and quasi-dark modes on the transmission of the system and we find an excellent agreement with our observed results. Adding to the enhanced transmission our results provide a deeper insight into the analogues of atomic induced transparency and offer an approach to engineer slow light devices, filters, and attenuators at terahertz frequencies.