Abstract
The studies of the media with an open surface of wave vectors (SWV) undertaken by the author in the 1970s are continued. A number of new specific features of these media are revealed. It is shown, in particular, that the focusing upon refraction at a plane boundary (a phenomenon that has recently attracted much attention and is related to the media whose permittivity and permeability are simultaneously negative) can also be realized in a nonmagnetic medium with an open SWV. The boundary problem for a plate and a semi-infinite crystal with an open SWV is solved, and the qualitative differences from the media with a closed SWV are revealed. Biaxial nonmagnetic media and nonmagnetic media in the presence of negative components of the dielectric and magnetic tensors are briefly considered.
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