Optimizing detection methods for terahertz bioimaging applications

We propose a new approach for efficient detection of terahertz (THz) radiation in biomedical imaging applications. A double-layered absorber consisting of a 32-nm-thick aluminum (Al) metallic layer, located on a glass medium (SiO2) of 1 mm thickness, was fabricated and used to design a fine-tuned ab...

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Bibliographic Details
Published in:Optical engineering 2015-06, Vol.54 (6), p.067107-067107
Main Authors: Bolakis, Christos, Karanasiou, Irene S, Grbovic, Dragoslav, Karunasiri, Gamani, Uzunoglu, Nikolaos
Format: Article
Language:English
Subjects:
Aluminum
Electrical resistivity
Fingerprints
Finite element method
Mathematical analysis
Monitoring
Optimization
Thin films
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Summary:We propose a new approach for efficient detection of terahertz (THz) radiation in biomedical imaging applications. A double-layered absorber consisting of a 32-nm-thick aluminum (Al) metallic layer, located on a glass medium (SiO2) of 1 mm thickness, was fabricated and used to design a fine-tuned absorber through a theoretical and finite element modeling process. The results indicate that the proposed low-cost, double-layered absorber can be tuned based on the metal layer sheet resistance and the thickness of various glass media. This can be done in a way that takes advantage of the diversity of the absorption of the metal films in the desired THz domain (6 to 10 THz). It was found that the composite absorber could absorb up to 86% (a percentage exceeding the 50%, previously shown to be the highest achievable when using single thin metal layer) and reflect
ISSN:0091-3286
1560-2303
DOI:10.1117/1.OE.54.6.067107