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Advances in Optical Technologies
Volume 2014 (2014), Article ID 405301, 10 pages
Research Article

Tunability of Triangular SRR and Wire Strip (TSRR-WS) Metamaterial at THz

1Department of ECE, Guru Tegh Bahadur Institute of Technology, GGSIPU, Delhi, India
2NIT Patna, Bihar, India

Received 19 October 2013; Revised 20 January 2014; Accepted 5 February 2014; Published 27 April 2014

Academic Editor: Augusto Beléndez

Copyright © 2014 Parul Dawar and Asok De. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper adumbrates a novel tunable metamaterial consisting of triangular split ring resonator (TSRR) and wire strip (WS) at THz frequency. Ansoft high frequency structure simulator (HFSS) has been used to design and analyse the metamaterial having Rogers RT/duroid 5870 (   =  2.33) and FR4 (   =  4.4) as substrate material. Nicolson Ross Weir (NRW) method has been used to retrieve the material parameters from transmission and reflection coefficient. 4% maximization has been obtained in the location of the negative region (or resonance frequency for permeability) by using FR4 with 0.75 μm instead of 1.25 μm as substrate thickness. In addition, 18% minimization has been achieved by using FR4 with 0.25 μm instead of RT/duroid 5870 substrate with the same thickness. Tunability has been proved by showing dependence of resonant frequency over the substrate thickness and substrate material.