Coupling of Terahertz Surface Plasmon Polaritons in Corrugated Stacks of Dielectric and Semiconductor

We present a theoretical approach that terahertz surface plasmon polaritons (THz-SPPs) are tuned by temperature in a stack of dielectric and semiconductor with periodic corrugations. Based on Rayleigh hypothesis, we show that when THz electromagnetic wave illuminates the waved stack, temperature-dependent THz-SPPs axe excited. At resonant modes, reflection dips or Fano-type resonance shape axe found. With increasing the temperature difference of the upper and lower semiconductor layers in the stack, transmissions increase and reflections decrease significantly. Our investigation indicates that such stacks may achieve potential applications in thermally controlled THz devices.