Departmental Papers (ESE)


The electromagnetic properties of a structure that is both chiral and periodic are investigated using coupled-mode equations. The chirality is characterized by the constitutive relations D = εE + iXicB and H = iXicE+B/µ, where Xic is the chiral admittance. The periodicity is described by a sinusoidal perturbation of the permittivity, permeability and chiral admittance. The coupled-mode equations are derived from physical considerations. The coupled-mode equations are used to examine bandgap structure and reflected and transmitted fields. Chirality is observed predominantly in transmission while periodicity is present in both reflection and transmission.

Document Type

Journal Article

Date of this Version

November 1989


Copyright 1989. Reprinted from IEEE Transactions on Antennas and Propagation, Volume 37, Issue 11, November 1989, pages 1447-1452.

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Date Posted: 19 May 2006

This document has been peer reviewed.