T. G. Mackay et al 2005 Europhys. Lett. 71 925 doi:10.1209/epl/i2005-10164-5
T. G. Mackay1, A. Lakhtakia2 and S. Setiawan1
Show affiliationsThe propagation of electromagnetic plane waves with negative phase velocity (NPV) is considered in Schwarzschild-(anti-)de Sitter spacetime. It is demonstrated that NPV propagation occurs in Schwarzschild-de Sitter spacetime at lower values of the cosmological constant than is the case for de Sitter spacetime. Furthermore, we report that neither is NPV propagation observed in Schwarzschild-anti-de Sitter spacetime, nor is it possible outside the event horizon of a Schwarzschild black hole.
41.20.Jb Electromagnetic wave propagation; radiowave propagation
04.40.Nr Einstein-Maxwell spacetimes, spacetimes with fluids, radiation or classical fields
Issue 6 (September 2005)
Received 17 March 2005, accepted for publication 9 July 2005, in final form 9 July 2005
Published 10 August 2005
T. G. Mackay et al 2005 Europhys. Lett. 71 925
N. Gehrels et al. 2004 ApJ 611 1005