A bilayer fish-scale metamaterial is experimentally demonstrated to function as a broad bandpass filter in the terahertz regime. The measured 3 dB-bandwidth for normal incidence is 1.13 THz with a high transmittance. The measured transmission spectrum is described well by a model based on an RLC circuit and multiple reflections. The filter is relatively insensitive to incidence angles up to 45°.
© 2012 Optical Society of America
Original Manuscript: December 12, 2011
Manuscript Accepted: December 28, 2011
Published: February 27, 2012
Xueqian Zhang, Jianqiang Gu, Wei Cao, Jiaguang Han, Akhlesh Lakhtakia, and Weili Zhang, "Bilayer-fish-scale ultrabroad terahertz bandpass filter," Opt. Lett. 37, 906-908 (2012)