Strongly enhanced propagation and non-reciprocal properties of CdSe nanowire based on hybrid nanostructures at communication wavelength of 1550 nm

Abstract

We theoretically investigate the propagation and non-reciprocal properties of cadmium selenide (CdSe) nanowire (NW), and achieve strongly field enhancement at communication wavelength of 1550 nm when combined with the hybrid nanostructure. By varying the parameters of the nanostructure, i.e., MgF2 and Ag substrates, together with grooves, relations between these properties and the parameters are illustrated in details. Particularly, with an optimal design, the propagation performance of the NW is highly improved. Moreover, by breaking the symmetry of the system, the non-reciprocal property without time modulations is obtained with high contrast employing the further optimal design. These novel results are significant to related applications such as photonic integrated circuit and optical communications.