Sensitivity Analysis of GaAs-Metamaterial Nanocavity as a Tunable Surface Plasmon Resonance Sensor

Background: The paper reports on typical characteristics of resonant electromagnetic modes propagation through interfaces of a multilayer device. Methods: Using the transfer matrix method, p-reflectance is analyzed in angular interrogation for a symmetrical cavity performed with left-handed metamaterial layer mediated with GaAs. Result: An advantage of SPR sensor is demonstrated in terms of optimal performances by controlling thicknesses, refractive indices and dielectric gap layers of the media involved. Conclusion: The functionality of the proposed design, as a tunable filter, has been also identified.