## Band structure of absorptive two-dimensional photonic crystals

JOSA B, Vol. 20, Issue 6, pp. 1334-1341 (2003)

http://dx.doi.org/10.1364/JOSAB.20.001334

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### Abstract

The band structure for an absorptive two-dimensional photonic crystal made from cylinders consisting of a Drude material is calculated. Absorption causes the spectrum to become complex and form islands in the negative complex half-plane. The boundaries of these islands are not always formed by the eigenvalues calculated for Bloch vectors on the characteristic path, and we find a hole in the spectrum. For realistic parameter values, the real part of the spectrum is hardly influenced by absorption, typically less than 0.25%. The employed method uses a Korringa–Kohn–Rostoker procedure together with analytical continuation. This results in an efficient approach that allows these band-structure calculations to be done on a Pentium III personal computer.

© 2003 Optical Society of America

**OCIS Codes**

(240.6680) Optics at surfaces : Surface plasmons

(260.2110) Physical optics : Electromagnetic optics

(260.3910) Physical optics : Metal optics

(290.4210) Scattering : Multiple scattering

**Citation**

Han van der Lem, Adriaan Tip, and Alexander Moroz, "Band structure of absorptive two-dimensional photonic crystals," J. Opt. Soc. Am. B **20**, 1334-1341 (2003)

http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-6-1334

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