Balamati Choudhury, Arya Menon, Rakesh Mohan Jha's Active Terahertz Metamaterial for Biomedical Applications PDF

By Balamati Choudhury, Arya Menon, Rakesh Mohan Jha

ISBN-10: 9812877924

ISBN-13: 9789812877925

ISBN-10: 9812877932

ISBN-13: 9789812877932

This booklet describes a metamaterial-based lively absorber for capability biomedical engineering purposes. Terahertz (THz) spectroscopy is a vital instrument for imaging within the box of biomedical engineering, because of the non-invasive, non-ionizing nature of terahertz radiation coupled with its propagation features in water, which permits the operator to acquire high-contrast pictures of pores and skin cancers, burns, and so forth. with out damaging results. so one can faucet this massive capability, you will need to construct hugely effective biomedical imaging structures through introducing terahertz absorbers into biomedical detectors. the most important problem confronted within the fulfilment of this goal is the shortcoming of clearly happening dielectrics, that is conquer with using artificially engineered resonant fabrics, viz. metamaterials. This ebook describes this type of metamaterial-based energetic absorber. The layout has been optimized utilizing particle swarm optimization (PSO), ultimately leading to an ultra-thin lively terahertz absorber. The absorber indicates close to cohesion absorption for a tuning diversity of terahertz (THz) application.

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Extra resources for Active Terahertz Metamaterial for Biomedical Applications

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Landy in 2008. Absorption of both the electric and magnetic energy is essential for improved performance. This requires tuning of material properties viz. the permittivity and permeability in order to make the impedance of the absorber equal to that of free space (Butler 2012). The impedance of free space is given as Zo ¼ rffiffiffiffiffi lo eo ð6Þ Similarly, the impedance of the absorber is given as Z¼ rffiffiffi rffiffiffiffiffiffiffiffiffi l lo lr ¼ e eo er ð7Þ Therefore in order to make Z = Zo, the relative permittivity, εr must be made equal to the relative permeability μr.

Optics Express 20(19): 21025–21032. V. A. H. Gregersen, O. W. Ziolkowski, and O. Breinbjerg. 2013. A review of the scattering parameter extraction method with References 39 clarification of ambiguity issues in relation to metamaterial homogenization. IEEE Antennas and Propagation Magazine 55(2): 91–106. , P. P. Jarzab, K. Nowak, E. F. Plinski, M. J. Walczakowski, and J. S. Witkowski. 2012. Dielectric properties of the FR-4 substrates in the THz frequency range. , Sept. 2012. , C. Wu, H. Li, and J.

5 µm. As a result, this technique cannot be used for the fabrication of the absorber with dimensions obtained from the PSO computational engine. Therefore, it is advised to use electron beam lithography for the fabrication of the CSRR absorber. It must be noted that a 5–10 % fabrication tolerance must always be considered during fabrication. Material Impurities: A 5 % shift in the material properties (in this case, permittivity of the substrate) must be considered in order to compensate for material impurities.

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Active Terahertz Metamaterial for Biomedical Applications by Balamati Choudhury, Arya Menon, Rakesh Mohan Jha

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