Remarks on the Electromagnetic Waves in a Medium with Negative ε and μ

摘要

The question whether main electrodynamics laws accept the existence of materials with negative ε and μ is considered. An obstacle to this is the negativity of the wave energy densityW in the theory of such media. It is shown that an attempt to change W sign only worsens the situation since it leads to the conflict of signs in the continuity equation.