We present an absorbing boundary condition for electromagnetic frequency domain simulations of photonic crystals and metamaterials. This boundary condition can simultaneously absorb multiple Bloch–Floquet eigenmodes of a periodic crystal, including both propagating and evanescent modes. The photonic crystal or metamaterial in question can include lossy, active, anisotropic, and even bi-anisotropic inclusions. The absorbing boundary condition is dependent on an orthogonality condition for Bloch–Floquet eigenmodes, a generalized version of which is presented here. We test this absorbing boundary condition numerically and present the results.
© 2013 Optical Society of America
Original Manuscript: May 28, 2013
Revised Manuscript: August 14, 2013
Manuscript Accepted: August 14, 2013
Published: September 5, 2013
Chris Fietz, "Absorbing boundary condition for Bloch–Floquet eigenmodes," J. Opt. Soc. Am. B 30, 2615-2620 (2013)