Brewster's angle silicon wafer terahertz linear polarizer

Antoine Wojdyla (1) , Guilhem Gallot (1)

1 LOB - Laboratoire d'optique et biosciences

We present a new cost-effective terahertz linear polarizer made from a stack of silicon wafers at Brewster's angle, andevaluate its performances. We show that this polarizer is wide-band, has a high extinction ratio (> 6 × 103) and very small insertion losses (inf 1%). We provide measurements of the temporal waveforms after linearly polarizing the THz beam and show that there is no distortion of the pulse. We compare its performances with a commercial wire-grid polarizer, and show that the Brewster's angle polarizer can conveniently be used to control the power of a terahertz beam. Cop. 2011 Optical Society of America.

Domains: Optics [physics.optics]

Antoine Wojdyla, Guilhem Gallot. Brewster's angle silicon wafer terahertz linear polarizer. Optics Express, 2011, 19 (15), pp.14099. ⟨10.1364/OE.19.014099⟩. ⟨hal-00803779⟩