“…In work [10], we considered the diffraction and polarization features of helical media in the presence of different signs of the components of ε and showed that, depending on the polarization, such media exhibit the optical properties of both right-handed and left-handed substances. Recently, we analyzed the case of diffraction from the slit for the situation of radiation penetration into anisotropic media with an open surface of wave vectors, which also have extraordinary optical properties [11]. Taking into account the features of light diffraction into a material medium is very important in the problems of creating new micron and nanosized structures using optical diffraction and X-ray methods, as well as for optical diffraction analysis of various materials, including modern nanoscopy.…”