In this paper, we consider a particular uniaxial material able to achieve the DB boundary condition. We show how, for particular transverse electromagnetic properties, this material behaves like a perfectly matched layer (PML). Moreover, we find that, with an approximation, the material becomes passive, i.e., loses the active part of the permittivity and of the permeability typical of a PML. In this case, the uniaxial medium becomes realizable as a particular absorbing metamaterial. We present simulations with both guided and free-space waves to show the absorbing behavior of the proposed material.
© 2013 Optical Society of America
Original Manuscript: July 10, 2013
Manuscript Accepted: August 6, 2013
Published: September 6, 2013
Nicola Tedeschi, Fabrizio Frezza, and Ari Sihvola, "On the perfectly matched layer and the DB boundary condition," J. Opt. Soc. Am. A 30, 1941-1946 (2013)