Frequency Selective Surfaces for High Sensitivity Terahertz Sensing
Christian Debus, Peter Haring Bol\'ivar
TL;DR
This paper introduces a frequency selective surface using asymmetric split ring resonators for high-sensitivity terahertz sensing, enabling detection of minute chemical and biochemical samples through resonance shifts caused by dielectric loading.
Contribution
It presents a novel FSS design with asymmetric split rings that enhances sensitivity for terahertz sensing applications, validated through numerical simulations.
Findings
Resonance shifts with dielectric loading enable detection of small sample amounts.
Strong E-field concentration improves sensing sensitivity.
Numerical simulations confirm the effectiveness of the proposed FSS design.
Abstract
An apporach for the sensing of small amounts of chemical and biochemical material is presented. A frequency selective surface (FSS) made from asymmetric split ring resonators (aDSR) is excited with free space radiation. Due to interference effects a resonance occurs with a steep flank in the frequency response which is shifted upon dielectric loading. Utilizing a strong E-field concentration by selective loading the detection of very small amounts of probe material becomes possible. The functionality is proven by numerical simulation and the optimization of structure and loading is performed.
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