The phonon-polariton spectrum of one-dimensional Rudin–Shapiro photonic superlattices with uniaxial polar materials

• 1D photonic superlattice.
• Quasi-regular Rudin–Shapiro unit cell.
• Uniaxial polaritonic materials.
• Phonon-polariton photonic modes.

The properties of the optical-phonon-associated polaritonic modes that appear under oblique light incidence in 1D superlattices made of photonic materials are studied. The investigated systems result from the periodic repetition of quasiregular Rudin–Shapiro (RS) multilayer units. It is assume that the structure consists of both passive non-dispersive layers of constant refraction index and active layers of uniaxial polar materials. In particular, we consider III–V wurtzite nitrides. The optical axis of these polaritonic materials is taken along the growth direction. Maxwell equations are solved using the transfer matrix technique for all admissible values of the incidence angle.