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

By Balamati Choudhury, Arya Menon, Rakesh Mohan Jha

This booklet describes a metamaterial-based energetic absorber for power biomedical engineering purposes. Terahertz (THz) spectroscopy is a vital device 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 photographs of dermis cancers, burns, and so on. with out unsafe results. for you to faucet this large strength, 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 inability of evidently taking place dielectrics, that is triumph over with using artificially engineered resonant fabrics, viz. metamaterials. This ebook describes any such 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 cohesion absorption for a tuning diversity of terahertz (THz) application.

Show description

Read or Download Active Terahertz Metamaterial for Biomedical Applications PDF

Best family & general practice books

Attention Deficit Hyperactivity Disorder Handbook: A Physician's Guide to ADHD

Readers of realization Deficit Hyperactivity sickness guide: A Physician's advisor to ADHD, moment version will discover a concise and scholarly paintings overlaying the latest advances in motives and administration of ADHD. The publication presents solutions to the various questions that encompass ADHD, reminiscent of: How is ADHD clinically determined?

Essential hypertension and its causes. Neural and non-neural mechanisms

This new account of the pathogenesis of crucial high blood pressure (EH) represents a close research of the most parts of the circulatory keep an eye on approach. The latter's homes resemble these of artificial adaptive keep watch over platforms within which regulatory parameters are altered whilst working stipulations exceed definite limits, usually via neural mechanisms.

Wireless Cortical Implantable Systems

Instant Cortical Implantable platforms examines the layout for information acquisition and transmission in cortical implants. the 1st a part of the booklet covers current procedure point cortical implants, in addition to destiny units. The authors speak about the foremost constraints when it comes to microelectronic integrations are awarded.

Psychosomatic Medicine: An International Primer for the Primary Care Setting

Psychosocial difficulties look inside a scientific context all over the world, and are a big burden to healthiness. Psychosomatic drugs: a global Primer for the first Care environment takes a uniquely worldwide technique in laying the rules of bio psychosocial easy care (such as spotting psychosocial and psychosomatic difficulties, easy counseling and collaboration with psychological wellbeing and fitness experts) and gives proper information regarding the most typical psychological and psychosomatic difficulties and issues.

Additional info for Active Terahertz Metamaterial for Biomedical Applications

Example text

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. 25 3 × 2 absorber array with CSRR unit cell Fig. 26 Rotation of inner ring by an angle θ with respect to outer ring where, L is the inductance of CSRR (Eq. 40), ro is the radius of the inner ring, Cpul is the per unit length capacitance between the rings, and k is a value calculated as: k¼ Cg ro Cpul ð38Þ 4 Design and Result Analysis 35 where, gap capacitance, Cg is given as Cg ¼ eo wh ; g ð39Þ where h is substrate thickness, w is the width of the rings, and g is the length of the gap in the rings.

Imhof, B. Lägel, S. Wolff, J. Heinrich, S. Höfling, A. Forchel, R. Zengerle, R. Beigang, and M. Rahm. 2009. Electrically tunable metamaterial for polarization-independent terahertz modulation. Conference on Lasers and Electro-optics, pp. 1–2, June 2009. , and V. P. Wallace. 2006. Biomedical Application of terahertz technology. Journal of Physics D: Applied Physics, 39(17). , S. Mridula, and P. Mohanan. 2011. Design of an edge–coupled dual-ring split-ring resonator. IEEE Antennas and Propagation Magazine 53(4).

8, a plane wave 3 Methodology Fig. 8 Diagram showing the E-fields in a slab of material with the given material parameters 19 x μο, εο, ηο Ein, Hin Efor, Hfor Etrans, Htrans μο, ε ο, ηο μs, ε s, ηs Eref, Href Eback, Hback z z=d y propagating in the z direction is incident on a slab of material with permittivity εs and permeability μs. The impedance of the material is given as ηs. Let, μo, εo, and ηo represent the permeability, permittivity, and impedance of free space. Further, let the E-field of the incident wave be in the x direction.

Download PDF sample

Rated 4.64 of 5 – based on 36 votes