The surface electromagnetic states in the structure of photonic crystal–ferrite–plasma like medium
Yu.O. Averkov, S.I. Tarapov, A.A. Kharchenko, and V.M. Yakovenko
O. Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine Kharkiv 61085, Ukraine
Received December 5, 2013
The dependences of frequencies of surface electromagnetic states in the structure of photonic crystal–ferrite–plasma-like medium on ferrite layer width, external constant magnetic field and temperature have been studied theoretically and experimentally. The photonic crystal has the form of a stack of a finite number of unit cells, each consisting of two different nonmagnetic dielectrics. The nonmagnetic semiconductor is used as a plasma-like medium. The constant magnetic field is applied parallel to the ferrite layer. The propagation direction of a monochromatic plane wave is perpendicular to the constant magnetic field, while the electrical component of the microwave field is parallel to the magnetic field. An analytical expression that relates the frequencies of the surface electromagnetic states to the structure parameters and the constant magnetic field value has been derived within the scope of nonconducting and magnetized, saturated ferrite. It is predicted that the states under study possesses a multimode property within the same forbidden band of the photonic crystal.
PACS: 73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations); PACS: 42.70.Qs Photonic bandgap materials; PACS: 85.70.Ge Ferrite and garnet devices.