Reflection Spectra from SiC Substrate with Circular-Slot Antennas and Possible Interaction between Surface-Plasmon Polaritons and Surface-Phonon Polaritons

Circular slot antennas were formed in an array on the surface of SiC. Surface-phonon polariton and surface-plasmon polariton signals were observed to appear at the same time in the spectra. The resonance spectrum of the surface-phonon polariton varied with the wavelength shift of the surface-plasmon polariton in association with the period of an array. This suggested a possibility that surface-plasmon polariton, in which electrons had a role, produced an effect on the spectral transformation of surface-phonon polariton.