J. of Electromagn. Waves and Appl., Vol. 24, 1991–1999, 2010 PERFECT ELECTROMAGNETIC CONDUCTOR AND FRACTIONAL DUAL INTERFACE PLACED IN A CHI- RAL NIHILITY MEDIUM A. Naqvi, S. Ahmed, and Q. A. Naqvi Department of Electronics Quaid-i-Azam University 45320, Islamabad, Pakistan Abstract—The reflection of plane wave from a perfect electromagnetic conductor (PEMC) and fractional dual interface placed in a chiral nihility medium is determined. It is noted that for both the cases reflected field is a backward wave. Electric and magnetic fields associated with the reflected wave do not cancel the corresponding electric and magnetic fields associated with the incident wave. It is also noted that in each case time average of the total power yields zero result, that is, the time average of the power incident on the interface cancels the time average of the reflected power. Chiral nihility waveguides, in which power may be confined to certain regions of the waveguide, are proposed. 1. INTRODUCTION The idea of Lakhtakia [1] for nihility medium, which was later extended to the chiral medium by Tretyakov et al. [2], is a topic of current research by many researchers. Tretyakov et al. [2] generalized the concept of nihility and introduced a more general concept of chiral nihility composite materials. According to them these materials can be realized in a similar way as mixture with ordinary nihility, by adding chiral inclusions. They have numerically shown that it is possible to arrive at a frequency where the real parts of both permittivity and permeability become zero, with the chirality parameter nonzero, and the imaginary parts of all the parameters can be rather small compared to the chirality parameter. In their work [3], they obtained 6.38 GHz as nihility frequency, at which both the permittivity and permeability Received 6 August 2010, Accepted 10 September 2010, Scheduled 23 September 2010 Corresponding author: Q. A. Naqvi (nqaisar@yahoo.com).