A novel terahertz wave reflective polarizer for THz communication

We design terahertz wave reflective polarizer that operates over a wide terahertz wavelength range and is based on a periodic bilayer structure. The structure is characterized by transfer matrix calculations. Results of simulations show that the mirror is highly reflecting for incidence angle θ ≤ 60°and TE as well as TM polarization in the wavelength range between 541.6 μm and 574.2 μm (i.e. frequency band between 522.5GHZ and 533.9 GHZ). As the incidence angle increases this reflection band blueshifts for both TM and TE polarizations.

Research Highlights
► With the rapid development of terahertz radiation sources and detectors, there is also a great demand for terahertz filters, polarizers and attenuators. However, quantitative studies on terahertz wave polarizer are still very limited. Therefore, it is valuable to investigate the design of a polarizer in the terahertz range. The present reflective polarizer of this letter is mechanically flexible and could be used for in-door terahertz wave communication systems.