International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

A magnetotunable negative refractive index material

Li Tianqian1,2*, Wen Guangjun1, Huang Yongjun1 and Xie Kang3
1School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu- 610054, China. 2School of Electrical and Information, Xihua University, Chengdu-610039, China. 3Key Laboratory of Broadband Optical Fiber Transmission and Communication Networks, Ministry of Education, University of Electronic Science and Technology of China, Chengdu-610054, China.
Email: [email protected]

  •  Accepted: 23 July 2011
  •  Published: 18 August 2011


A magnetically tunable negative refractive index material is made by incorporating periodic metallic wire array (PMWA) into yttrium iron garnet (YIG) slices. Applied by external magnetic field, the effective permeability of YIG is negative in certain frequency band. PMWA also exhibit negative effective permittivity in certain frequency band. In the overlapping area of two bands, the effective permeability and effective permittivity are negative simultaneously. Consequently, negative refraction occurs in the composite. The negative refractive phenomenon is observed by prism experiment from 7.5 to 8.5 GHz under 2200Oe external magnetic field. The experimental results show that the composite medium consisting of PMWA with negative effective permittivity and YIG slices with negative effective permeability is negative refractive index material.


Key words: Periodic metallic wire array, yttrium iron garnet, magnetotunable, negative refractive index material.