Beam waist measurement for terahertz time-domain spectroscopy experiments

Alexander Podzorov (1) , Antoine Wojdyla (1) , Guilhem Gallot (1)

1 LOB - Laboratoire d'optique et biosciences

Classical masking aperture methods are found to be mostly inaccurate to determine the terahertz beam size in terahertz time-domain spectroscopy (TDS) experiments, owing to complex diffraction effects. Here, we present a simple and reliable method for measuring beam waists in terahertz TDS. It is based on the suecessive diffraction by an opaque disk followed by a small circular aperture. Cop. 2010 Optical Society of America.

Domains: Optics [physics.optics]

Alexander Podzorov, Antoine Wojdyla, Guilhem Gallot. Beam waist measurement for terahertz time-domain spectroscopy experiments. Optics Letters, 2010, 35 (7), pp.901. ⟨10.1364/OL.35.000901⟩. ⟨hal-00804604⟩