NDLI: Tunable, switchable, and one-way electromagnetic wave absorbers based on metamaterial structures

Content Provider	IEEE Xplore Digital Library
Author	Yijun Feng Bo Zhu Junming Zhao Hao Yuan Liang Sun Tian Jiang
Copyright Year	2014
Description	Author affiliation: Dept. of Electron. Eng., Nanjing Univ., Nanjing, China (Yijun Feng; Bo Zhu; Junming Zhao; Hao Yuan; Liang Sun; Tian Jiang)
Abstract	Recently metamaterials have been employed to construct electromagnetic (EM) wave absorbers [1]. The idea of metamaterial absorber is to adjust the effective permittivity and permeability independently by varying the dimensions of electric and magnetic resonant components in the unit cell so as to match the effective impedance of the absorber to free space and achieve a large resonant dissipation at the meantime. Thus, wave transmission and reflection are minimized simultaneously and absorption is maximized. Although metamaterial absorber has relatively narrow bandwidth, it possesses many advantages such as high absorption, low density, and thin electric thickness. Moreover, the frequency response can be tailored or scaled from microwave to terahertz and infrared regimes through carefully designing the constituent resonant structures. Since the EM performance of the metamaterial absorber is entirely determined by the resonant structure in the unit cell, it is possible to change or control the absorber performance by incorporating active elements into the resonant unit cell [2-3]. In this presentation, we will report on several controllable metamaterial absorbers that are realized by integrating resonant unit cell structure with microwave varactors or diodes, as well as a one-way microwave energy absorber based on a composite metamaterial structure including chiral structure. These metamaterial absorbers with tunable, switchable or one-way performances could find application in many functional devices for manipulation of the EM wave propagation and the design concept could also be scaled to other frequency band such as terahertz or optical range.
Starting Page	273
Ending Page	273
File Size	69459
Page Count	1
File Format	PDF
ISBN	9781479923311
e-ISBN	9781479923298
DOI	10.1109/IWAT.2014.6958659
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-04
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Varactors Absorption Optical switches Microwave circuits Metamaterials Magnetic materials
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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