Maral Mirzamohammadi

Gap-engineered four-spiral terahertz metamaterial absorber for ratio-based self-referenced refractive-index sensing

A gap-engineered four-spiral terahertz (THz) metamaterial absorber is proposed for multi-mode, self-referenced refractive-index sensing using a normalized ratio-based readout. The unit cell consists of four square-spiral Au resonators arranged in a 2 × 2 configuration on a low-lo...