Photonic Crystal Resonator in the Millimeter/Terahertz Range as a Thin Film Sensor for Future Biosensor Applications

Abstract With recent developments, terahertz (THz) technology has attracted great interest in many different fields of research and application. In particular, biosensors that detect a thin film captured pathogens are high demand for rapid diagnosis. Based on the interaction between analytes under test electromagnetic (EM) field, THz resonators sensitive to changes permittivity analyte have potential become thin-film sensors. However, conventional metamaterial methods low Q factors, leading small amplitude variations ambiguous detection. Here, we present photonic crystal (PhC)–based resonator with factor is monolayer beads µm size range. The PhC made resistivity silicon (HRSi) shows 750, which much higher compared metamaterial-based methods. Its resonance shift linearly related coverage micron-sized its surface. Moreover, simulation results model single layer showed agreement experimental results. Although achieved sensitivity needs be improved by enhancing field concentration analyte, our suggest promising biosensing applications. We anticipate work starting point biochips sensing capabilities more functionality.