Synthesizing low loss negative index metamaterial stacks for the mid-infrared using genetic algorithms

Jeremy A. Bossard, Seokho Yun, Douglas H. Werner, Theresa S. Mayer

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Negative index metamaterial designs for the mid-infrared with low absorption and impedance mismatch losses are presented. A robust genetic algorithm is employed to optimize the flexible metamaterial structure for targeted refractive index and impedance values. A new figure of merit is introduced to evaluate the impedance match of the metamaterial to free space. Two designs are presented demonstrating low-loss characteristics for a thin metamaterial with two metal screens and a thick metamaterial stack with five screens. The device performance is analyzed when adding more screens to the structure, revealing that optimizing a thick stack produces a metamaterial with properties approaching those of a bulk material.

Original languageEnglish (US)
Pages (from-to)14771-14779
Number of pages9
JournalOptics Express
Volume17
Issue number17
DOIs
StatePublished - Aug 17 2009

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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