We present an ultrathin and flexible microwave broadband polarization transformer concept based on oriented carbon nanotubes dispersed in a polycarbonate matrix. Stacking anisotropic composite films with a controlled angle mismatch between successive layers produces a twist polarizer able to change the orientation of the electric field over broad frequency range in the microwave domain. The smart organization confers to the multilayer a high efficiency measured as a degree of twist, which reaches 75.1% at GHz frequencies for a 420 lm thick seven-layer stack.
Danlée, Y., Huynen, I., & Bailly, C. (2017). Flexible twist polarizer based on ultrathin multi-layered polymer-carbon nanotubes composite films : DANLÉE et al. Microwave & Optical Technology Letters, 59, 2844-2848. https://doi.org/10.1002/mop.30839 (Original work published 2017)