Quasi-Optical Terahertz Polarizers Enabled by Inkjet Printing of Carbon Nanocomposites
journal contributionposted on 03.12.2013 by Arindam Das, Thomas Schutzius, Constantine M. Megaridis
Any type of content formally published in an academic journal, usually following a peer-review process.
We report a new approach for cost-effective manufacturing of THz quasi-optical polarizers by inkjet printing of polymer-carbon nanowhisker (CNW) dispersions. The electromagnetic interference properties of coatings with fixed CNW/polymer composition and varying thickness are quantified by a frequency domain THz spectroscopy system in the range 570-630GHz. A shielding effectiveness of ~40dB is attained for 70m-thick coatings. A prototype THz polarizer printed on Mylar film displayed transmission and absorbance that varied with polarization orientation. The degree of polarization for film thickness of ~1μm was 0.35. This performance can be improved by refining grid dimensions, increasing coating thickness and adopting multi-layer polarizer structures.