TY - JOUR

T1 - Optical properties of a dielectric-metallic superlattice: The complex photonic bands

AU - Soto-Puebla, D.

AU - Xiao, M.

AU - Ramos-Mendieta, F.

PY - 2004/6/7

Y1 - 2004/6/7

N2 - We have studied theoretically the photonic bands in a periodic dielectric-metallic superlattice. In the calculations the absorption in the metallic layers was taken into account using the well-known Drude model for the dielectric function, ε(ω)=1-ωp2/ ω(ω+iγ). Due to the absorption in the metallic films, the Bloch vector becomes complex for all frequencies, and the waves are evanescent. The photonic band structure is strongly modified as compared to the band structure of the nonabsorbent superlattice, mainly in the region of low frequencies ω<ωpwhere bands of odd behavior appear. We also have studied the absorption, reflection and transmission spectra of light incident on a finite superlattice. The spectra show that the complex bands, with complex wave vector and real frequency, are an appropriate resource to describe the optical properties of periodic absorbent structures. © 2004 Elsevier B.V. All rights reserved.

AB - We have studied theoretically the photonic bands in a periodic dielectric-metallic superlattice. In the calculations the absorption in the metallic layers was taken into account using the well-known Drude model for the dielectric function, ε(ω)=1-ωp2/ ω(ω+iγ). Due to the absorption in the metallic films, the Bloch vector becomes complex for all frequencies, and the waves are evanescent. The photonic band structure is strongly modified as compared to the band structure of the nonabsorbent superlattice, mainly in the region of low frequencies ω<ωpwhere bands of odd behavior appear. We also have studied the absorption, reflection and transmission spectra of light incident on a finite superlattice. The spectra show that the complex bands, with complex wave vector and real frequency, are an appropriate resource to describe the optical properties of periodic absorbent structures. © 2004 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.physleta.2004.03.070

DO - 10.1016/j.physleta.2004.03.070

M3 - Article

SP - 273

EP - 280

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

SN - 0375-9601

ER -