Realization of Circular Slot Frequency Selective Surfaces using Photoplotter and Wet Etching Technique for Terahertz Material Sensing Applications

Abstract

Terahertz radiation is in spectral region of 0.1THz to 10THz between microwave and infrared part of the electromagnetic spectrum. Terahertz radiation can propagate through wide range of dielectric materials [1]. This sparked many researchers' interest to further explore the potentiality of characterization, detection and sensing studies at terahertz range. Recently, Terahertz Time-Domain Spectroscopy has emerged as an attractive technique that enables the label-free detection on chemical and biological compounds [2]. It is because, the most of non-conductive materials such as chemical and biological compounds have unique molecular resonance that able to translate as transmission or absorption peak at terahertz range. Past studies show that, terahertz spectroscopy is more suitable in sensing, detection and characterization of various forms of material state, such as illicit drugs and explosive substances, alcohol and antibiotics contents, fructose