By Balamati Choudhury, Arya Menon, Rakesh Mohan Jha
This e-book describes a metamaterial-based lively 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 acquire high-contrast pictures of pores and skin cancers, burns, and so forth. with out hazardous results. as a way to faucet this massive capability, you will need to construct hugely effective biomedical imaging platforms by way of introducing terahertz absorbers into biomedical detectors. the most important problem confronted within the fulfilment of this goal is the shortcoming of obviously taking place dielectrics, that is conquer with using artificially engineered resonant fabrics, viz. metamaterials. This e-book describes any such metamaterial-based energetic absorber. The layout has been optimized utilizing particle swarm optimization (PSO), finally leading to an ultra-thin lively terahertz absorber. The absorber indicates close to cohesion absorption for a tuning variety of terahertz (THz) application.
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Extra resources for Active Terahertz Metamaterial for Biomedical Applications
The properties of such materials are inconsistent with the current design. Hence, MEMS-based tuning is best suited for this design. The resonant frequency of a CSRR depends on the position of the gaps in the rings with respect to each other (Saha and Siddiqui 2009). The resonant frequency of resonance changes with rotation of the inner by an angle θ (Fig. 26). The new resonant frequency can be obtained using Eq. (37) by solving Eqs. (38)–(40). fo ¼ 1 sﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃ ðp þ kÞ2 À h2 2p 2ro L Cpul 2ðp þ kÞ ð37Þ 34 Active Terahertz Metamaterial for Biomedical Applications Fig.
2005. Terahertz response of a microfabricated rod–split-ring-resonator electromagnetic metamaterial. Physical Review Letters 063901-1–063901-4. , P. Kužel, F. Kadlec, C. Kadlec, R. Yahiaoui, and P. Mounaix. 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.
Following this, a speciﬁc soft computing technique viz. PSO is discussed. PSO will be used as the optimization tool in this work. Introduction to Soft Computing: Soft computing is not a single technique, but a group of computational techniques comprising of artiﬁcial intelligence, machine learning, and evolutionary techniques used for analysis and modeling of complex phenomenon where low-cost analytical formulations does not exist. The term soft computing was ﬁrst coined by Zadeh in (1992). Soft computing techniques are characterized by their ability to arrive at accurate, low-cost, robust solutions despite approximations and uncertainty in their design.
Active Terahertz Metamaterial for Biomedical Applications by Balamati Choudhury, Arya Menon, Rakesh Mohan Jha