Observation of spurious spectral features in mixed-powder compressed
pellets measured by terahertz time-domain spectroscopy
Abstract
Spurious loss features were observed in mixed-powder compressed pellets
measured in transmission using terahertz time-domain spectroscopy. Loss
features were identified in two types of pellets: PTFE-glass
microspheres and PTFE-lactose. The features were found to be dependent
on particle size and concentration. An explanation is proposed, based on
varying optical thickness of the sample material.