Design of Frequency Selective Devices for the THz Domain with Applications on Structural Health Monitoring

In this paper, a study on the transmittance as a function of applied force for a new THz sensor is proposed. The sensor consists of two frequency selective surfaces (FSSs) based on metamaterial wire resonators and works as a re-configurable selective THz filter in which only radiation of certain desired frequencies is allowed to pass. Numerical modelling of both the mechanical and electromagnetics behavior of the sensor is reported for a device assembled with a High-Density PolyEthylene (HDPE) thermoplastic polymer host at a target frequency of 408 GHz.