Broadband optimization for a terahertz metamaterial absorber

Huang, Wanxia; Lin, Wan‐Chen; Wang, L.; Chang, Linzi; Liao, Cheng

doi:10.1109/imws2.2012.6338237

Cited by 2 publications

(1 citation statement)

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“…As a result of this configuration, the negative permittivity was observed in the following bands: 378-500 GHz (due to the cruciform structures) and 626-677 GHz (due to the squares). Huang et al (2012) used continuous ant colony optimization (CACO) and differential evolution strategy (DES) in order to optimize a broadband terahertz absorber. After the implementation of the algorithms, optimized dimensions of the structure were obtained such that the band of frequencies over which the absorption was greater than 90 % increased to 0.872-0.975 THz from 0.885 to 0.965 THz.…”

Section: Metamaterialsmentioning

confidence: 99%

Active Terahertz Metamaterial for Biomedical Applications

Choudhury

Menon

Jha

2015

Active Terahertz Metamaterial for Biomedical Applications

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Terahertz (THz) spectroscopy is gaining momentum as a tool for imaging in the field of biomedical engineering. This increase in popularity is due to the non-invasive, non-ionizing nature of terahertz radiation coupled with its propagation characteristics in water, which allows the operator to obtain high-contrast images of skin cancers, burns, etc. without detrimental effects. In order to tap this huge potential, researchers worldwide are aiming to build highly efficient biomedical imaging systems by introducing terahertz absorbers into biomedical detectors. The biggest challenge faced in the fulfilment of this objective is the lack of naturally occurring dielectrics, which is overcome with the use of artificially engineered resonant materials, viz. the metamaterials. This book describes such a metamaterial-based active absorber. The design has been optimized using particle swarm optimization (PSO), eventually resulting in an ultra-thin active terahertz absorber. The absorber shows near unity absorption for a tuning range of terahertz (THz) application.

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Section: Metamaterialsmentioning

confidence: 99%