Highly-flexible wide angle of incidence terahertz metamaterial absorber
  We present the design, fabrication, and characterization of a metamaterial absorber which is resonant at terahertz frequencies. We experimentally demonstrate an absorptivity of 0.97 at 1.6 terahertz. Importantly, this free-standing absorber is only 16 microns thick resulting in a highly flexible material that, further, operates over a wide range of angles of incidence for both transverse electric and transverse magnetic radiation. 
Hu Tao, C. M. Bingham, A. C. Strikwerda, D. Pilon, D. Shrekenhamer, N.   I. Landy, K. Fan, X. Zhang, W. J. Padilla, R. D. Av...