Tunable Fano Resonance and Enhanced Sensing in Terahertz Metamaterial

Fano resonances in metamaterial are important due to their low-loss subradiant behavior that allows excitation of high quality ( Q ) factor extending from the microwave optical bands. have recently showed great potential areas modulation, filtering, and sensing for extremely narrow linewidths. However, a system arise interaction all form structure, limiting tunability resonances. Besides, trace analytes using still challenging. In present work, we demonstrate consisting period array two concentric double-split-ring resonators with symmetry breaking (position asymmetry gaps asymmetry). The both studied detail. Introducing position leads one resonance located at 0.50 THz, while introducing results 0.35 THz THz. transmittance, position, linewidth three can be easily tuned by varying deviations. figure merit (FoM) different deviations calculated performance optimization. having highest FoM used refractive indices, performing best index is further applied detect analyte thickness. tunable show tremendous applications, offering an approach engineering highly efficient modulators sensors.