  The theory of optical effects in hydrogenated graphene (graphane) in
terahertz and infrared range is developed, including the analysis of complex
conductivity, reflection coefficient for graphane on a substrate and dispersion
of surface plasmon-polaritons. The calculations are based on quite simple
analytical approximation of graphane band structure in the vicinity of
Gamma-point and on the modified model of quantum coherence relaxation.
Comparison of the obtained theoretical results with corresponding experimental
data can be used both for the determination of graphane characteristics (Fermi
level, relaxation rate etc.) and for the investigation of potential
applications of this material in the design of new optical elements.
