Polarisation properties of dielectric structures with a double-sided surface relief

An investigation of the polarisation properties of dielectric structures with a double-sided periodic relief is reported. A brief description is given of a method which can be used to calculate the dependences of the transmission by, reflection from, and losses in a dielectric film with a periodic surface relief on the thickness of this film, and on the wavelength and angle of incidence of light. A numerical calculation, confirmed experimentally, reveals that such structures exhibit polarisation-dependent abrupt changes in the transmission and reflection near certain wavelengths or film thicknesses.