Abstract
It was recently demonstrated that surface electromagnetic waves can propagate inside stratified lossy conductive media. Here we consider electromagnetic waves in lossy conductive media in the cylindrical and spherical symmetry cases. We demonstrate that low loss electromagnetic waves may also propagate along cylindrical channels inside lossy media. Applications of these cylindrical waves may include active communication through plasma, search for underground cables, and propagation of electromagnetic signals along bones and nerves inside biological tissues. On the other hand, consideration of the spherical symmetry case indicates the possibility of deeply subwavelength ‘hot spots’ inside highly lossy biological tissues.
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