Abstract-Metamaterial-based design for a half-wavelength plate in the terahertz range

• Radu Malureanu, 
• Wujiong Sun, 
• Maksim Zalkovskij, 
• Qiong He, 
• Lei Zhou, 
• Peter Uhd Jepsen, 
• Andrei Lavrinenko
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• http://link.springer.com/article/10.1007%2Fs00339-015-9078-3
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In this work, a new design aimed to perform as a half-wavelength plate in the terahertz regime is presented. The fabricated samples exhibit a phase difference of 180° at 0.73 THz between the two principal polarisations that matches with the modelling results. The experimentally determined transmittances of the two polarisations were around 61 %, which is below theoretical predictions of reaching more than 90 %. The difference between the two results is explained, and possibilities for increasing the transmittance are presented.