  Optical space in metamaterials may be engineered to emulate four dimensional
Kaluza-Klein theory. Nonlinear optics of such metamaterials mimics interaction
of quantized electric charges. An electromagnetic wormhole is designed, which
connects two points of such an optical space and changes its effective
topology. Electromagnetic field configurations which exhibit fractional charges
appear as a result of such topology change. Moreover, such effects as
Misner-Wheeler charge without charge may be replicated.
