Compact terahertz wave polarizing beam splitter.
We designed a compact terahertz (THz) wave polarizing beam splitter based on a periodic bilayer structure, which operates over a wide THz wavelength range. Within a short length (about 1 mm), this polarizing beam splitter separates THz wave TE- and TM-polarized modes into orthogonal output waveguides. Results of simulations with the finite-element method show that 99.99% of the TE-polarized THz wave is deflected by the periodic bilayer structure (with 39.9 dB extinction ratio), whereas 99.58% of the TM-polarized THz wave propagates through the structure (with a 23.7 dB extinction ratio). Tolerance analysis reveals a large tolerance to fabrication errors.
Li
Jiu-Sheng
JS
Centre for THz Research, China Jiliang University, Hangzhou 310018, China. lijsh2008@126.com
Xu
De-gang
DG
Yao
Jian-quan
JQ