Numerical removal of water-vapor effects from THz-TDS measurements

  title={Numerical removal of water-vapor effects from THz-TDS measurements},
  author={Withawat Withayachumnankul and Bernd M. Fischer and Samuel P. Mickan and Derek Abbott},
One source of disturbance in a pulsed T-ray signal is attributed to ambient water vapor. Water molecules in the gas phase selectively absorb T-rays at discrete frequencies corresponding to their molecular rotational transitions. This results in prominent resonances spread over the T-ray spectrum, and in the time domain the T-ray signal is observed as fluctuations after the main pulse. These effects are generally undesired, since they may mask critical spectroscopic data. So, ambient water vapor… CONTINUE READING