Tuning the Resonance of the Excessively Tilted LPFG-Assisted Surface Plasmon Polaritons: Optimum Design Rules for Ultrasensitive Refractometric Sensor
An excessively tilted LPFG-assisted surface plasmon polaritons sensor (ExTLPFG assisted SPP sensor) with ultrahigh sensitivity is proposed and numerically investigated using the finite-element-method-based full-vector complex coupled mode theory.We show that the SPP mode is transited (or excited) gradually from both the p-polarized TM0,j and EHv,j