Title :
Periodic chiral structures
Author :
Jaggard, Dwight L. ; Engheta, Nander ; Kowarz, Marek W. ; Pelet, Philippe ; Liu, John C. ; Kim, Yunjin
Author_Institution :
Dept. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA
fDate :
11/1/1989 12:00:00 AM
Abstract :
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+iξcB and H=iξcE+B/μ, where ξc 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 and used to examine bandgap structure and reflected and transmitted fields. Chirality is observed predominantly in transmission, whereas periodicity is present in both reflection and transmission
Keywords :
electromagnetic wave propagation; admittance; chiral structures; coupled-mode equations; electromagnetic wave propagation; periodic; permeability; permittivity; reflection; sinusoidal perturbation; transmission; Admittance; Biomedical optical imaging; Electromagnetic coupling; Electromagnetic propagation; Equations; Geometrical optics; Helium; Periodic structures; Permittivity; Photonic band gap;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
