By Balamati Choudhury, Arya Menon, Rakesh Mohan Jha
This booklet describes a metamaterial-based energetic absorber for strength biomedical engineering functions. Terahertz (THz) spectroscopy is a vital software for imaging within the box of biomedical engineering, as a result non-invasive, non-ionizing nature of terahertz radiation coupled with its propagation features in water, which permits the operator to procure high-contrast photos of epidermis cancers, burns, and so on. with out harmful results. with a view to faucet this large power, it is very important construct hugely effective biomedical imaging structures via introducing terahertz absorbers into biomedical detectors. the most important problem confronted within the fulfilment of this target is the shortcoming of evidently happening dielectrics, that is triumph over with using artificially engineered resonant fabrics, viz. metamaterials. This publication describes the sort of metamaterial-based lively absorber. The layout has been optimized utilizing particle swarm optimization (PSO), finally leading to an ultra-thin energetic terahertz absorber. The absorber indicates close to team spirit absorption for a tuning diversity of terahertz (THz) application.
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Extra info for Active Terahertz Metamaterial for Biomedical Applications
2009. Tunable terahertz metamaterials with negative permeability. Physical Review Letters 79: 241108-1–241108-4. , and O. Aktas. 2011. Continuously tunable terahertz metamaterial employing magnetically actuated cantilevers. Optics Express 19(7): 5741–5752. Padilla, W. , A. J. Taylor, C. Highstrete, M. Lee, and R. D. Averitt. 2006. Dynamical electric metamaterial response at terahertz frequencies. Proceedings of the 15th International Conference, Paciﬁc Grove, USA, pp. 642–644, Aug 2006. N. Vrahatis.
S. M. B. Ustinov, Y. Park, J. -W. Lee. 2012. Tunable metamaterial structures for controlling THz radiation. IEEE Transactions on Terahertz Science and Technology 2(5): 538–549. References 41 Vinoy, K. , and R. M. Jha. 1996. Radar Absorbing Materials from Theory to Design and Characterization. Kluwer Academic Publishers, Boston. ISBN:0-7923-9753-3. , X. Li, and W. Zhu. 2013a. A tunable metamaterial absorber employing MEMS actuators in THz regime. NEMS, pp. 829–832, China, Apr. 2013. , X. Li, and W.
This can be attributed to the fact that material properties of the 26 Active Terahertz Metamaterial for Biomedical Applications Fig. 15 Absorption in metamaterial absorber (Fig. 14) Fig. 25 GHz respectively constituent elements change in the terahertz regime. Further, thickness of the substrate obtained through direct scaling may not be sufﬁcient enough to minimize reflection. 59 μm. Also, polyimide and gold were chosen as the dielectric and the metal respectively since the usage of these materials in the terahertz regime have been well documented.
Active Terahertz Metamaterial for Biomedical Applications by Balamati Choudhury, Arya Menon, Rakesh Mohan Jha
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