Tunable plasmonic response of Linked dimer disks in Terahetz Range

We investigate numerically optical properties of a periodic array of InSb dimer disks, in the THz range, by FDTD (finite difference time domain) method. Two THz plasmonic modes are observed; charge transfer plasmon mode and bonding dipole plasmon mode, which are tunable by varying geometric parameters of the conductive junction. This plasmonic structure has significant applications such as high sensitivity; biosensors, photodetectors, imaging, security and spectroscopy in the THz range