Compact terahertz wave polarizing beam splitter

Abstract

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 $1\mathrm{mm}$), 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 $39.9\mathrm{dB}$ extinction ratio), whereas 99.58% of the TM-polarized THz wave propagates through the structure (with a $23.7\mathrm{dB}$ extinction ratio). Tolerance analysis reveals a large tolerance to fabrication errors.

© 2010 Optical Society of America

Terahertz wave polarization beam splitter using a cascaded multimode interference structure

Jiu-sheng Li, Han Liu, and Le Zhang
Appl. Opt. 53(22) 5024-5028 (2014)

Compact terahertz wave polarization beam splitter using photonic crystal

Guo-qiang Mo and Jiu-sheng Li
Appl. Opt. 55(25) 7093-7097 (2016)

Ultracompact high-efficiency polarizing beam splitter with a hybrid photonic crystal and conventional waveguide structure

Seunghyun Kim, Gregory P. Nordin, Jingbo Cai, and Jianhua Jiang
Opt. Lett. 28(23) 2384-2386 (2003)

Terahertz reflectarray as a polarizing beam splitter

Tiaoming Niu, Withawat Withayachumnankul, Aditi Upadhyay, Philipp Gutruf, Derek Abbott, Madhu Bhaskaran, Sharath Sriram, and Christophe Fumeaux
Opt. Express 22(13) 16148-16160 (2014)

Compact high extinction ratio asymmetric polarization beam splitter of periodic rods waveguide

Jin Hou, Linzhi Wang, Chunyong Yang, Bing Wang, and Shaoping Chen
Appl. Opt. 54(34) 10277-10282 (2015)