PECULIARITIES OF LIGHT FOCUSING WITH A FLAT LENS BASED ON THE METAL–DIELECTRIC STRUCTURE
Abstract
It is shown that lenses based on the metal – dielectric (MD) structure are energetically more efficient in ultraviolet and violet ranges of wavelengths. Phase characteristics of flat lenses in ultraviolet as well as in visible ranges for the p-polarized light have a concave shape, which is the necessary condition of focusing. For the first time, direct measurement is made of the flat optically thin two-layered MD-structure (Ag/SiO2 ). It has been found experimentally that for an incident spherical wave with radial polarization (p-polarization), the focusing regime is realized, and with azimuthal polarization (s-polarization) the channeling regime is realized.
About the Authors
N. S. Kazak
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
A. V. Agashkov
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
N. A. Khilo
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
A. M. Varanetski
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
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