title: Defect modes and transmission properties of left-handed bandgap structures.
abstract: We analyze transmission of electromagnetic waves through a one-dimensional periodic layered structure consisting of slabs of a left-handed metamaterial and air. We derive the effective parameters of the metamaterial from a microscopic structure of wires and split-ring resonators possessing the left-handed characteristics in the microwave frequency range, and then study, by means of the transfer-matrix approach and the finite-difference time-domain numerical simulations, the transmission properties of this layered structure in a band gap associated with the zero averaged refractive index. By introducing defects, the transmission of such a structure can be made tunable, and we study the similarities and differences of the defects modes excited in two types of the band gaps.
authors.affiliation: Nonlinear Physics Centre and Centre for Ultra-high Bandwidth Devices for Optical Systems (CUDOS), Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors.forename: Ilya V
authors.initials: IV
authors.lastname: Shadrivov
authors.forename: Nina A
authors.initials: NA
authors.lastname: Zharova
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Zharov
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar