Hexagonal dielectric loaded nantenna for optical ITU-T C-band communication

Antennas designed with nano scale technologies, at optical frequencies, will be a corner stone in next generation nano communication links and networks. These optical antennas, operating in the THz regime of electromagnetic spectrum, will be applicable to fields including biomedical, environmental, military, and civilian communications. In this paper, authors propose and explore the potential benefits of designing a hexagonal dielectric loaded nantenna (HDLN) at a center frequency of 193.5 THz using CST Microwave Studio. The nantenna consists of Silver `Ag' as partial ground plane, a top and bottom `SiO₂' substrate and a `Si' hexagon as dielectric fed by a `Ag' nanostrip transmission line. The simulated nantenna achieves a wide impedance bandwidth of 3.7% from 190.9 THz to 198.1 THz and an end-fire directivity of 8 dBi, covering all the standard optical transmission window at the ITU-T optical communication 1550 nm C-band.