Plasmon polaritons in photonic superlattices containing a left-handed material

¹  Instituto de Física, Universidad de Antioquia - AA 1226, Medellín, Colombia
²  Instituto de Física, UNICAMP - CP 6165, Campinas-SP, 13083-970, Brazil
³  Institute of Physics, NASB - F. Skarina Ave. 68, Minsk, 220072, Belarus
⁴  Instituto de Física, UFAL, Cidade Universitária - 57072-970, Maceió-AL, Brazil
⁵  Instituto de Física, UFRJ, Rio de Janeiro-RJ - 21945-972, Brazil
⁶  Inmetro, Campus de Xerém, Duque de Caxias-RJ - 25250-020, Brazil

Corresponding author: sbessa@gmail.com

Received: 20 July 2009
Accepted: 7 October 2009

Abstract

We analyze one-dimensional photonic superlattices which alternate layers of air and a left-handed material. We assume Drude-type dispersive responses for the dielectric permittivity and magnetic permeability of the left-handed material. Maxwell's equations and the transfer-matrix technique are used to derive the dispersion relation and transmission spectra for the propagation of obliquely incident optical fields. The photonic dispersion indicates that the growth direction component of the electric (or magnetic) field leads to the propagation of electric (or magnetic) plasmon polaritons, for either TE or TM configurations. Furthermore, we show that if the plasma frequency is chosen within the photonic = 0 zeroth-order bandgap, the coupling of light with plasmons weakens considerably. As light propagation is forbidden in that particular frequency region, the plasmon-polariton mode reduces to a pure plasmon mode.