Control of light tunneling through electromagnetically induced transparency-like metamaterials

Light tunneling phenomenon controlled by electromagnetically-induced-transparency-like (EIT-like) metamaterials is investigated. The numerical results show that, when a EIT-like metamaterial layer is introduced at the interface of a pair structure constructed by two kinds of single-negative metamaterials, the EIT-like system can give rise to the enhancement of Q-factor of the tunneling mode. Moreover, the Q-factor can be tuned by altering paremeters of the EIT-like metamaterial. Compared with the traditional method of increasing confinement, the presented way has the advantages of miniaturized device volume and less transmission losses.