Speaker
Mr
Shane Smith
(Physics Post Graduate Student)
Description
Terahertz time-domain spectroscopy is a powerful spectroscopic tool. Due to the long wavelength of terahertz radiation, it has a high penetration depth, thus allowing for high resolution at low intensity, and low photon energy, making it ideal for non-destructive spectroscopy. Normally terahertz spectroscopy is performed in transmission, due to the simplicity of such a setup and extracting information from the transmission data. Transmission setups have limitations unfortunately. Terahertz radiation is strongly absorbed by water and thus it is near impossible to analyse a sample in an aqueous environment, nor any other material that is optically dense to terahertz radiation. To investigate such samples, it would be preferable to work in reflection, but conventional reflection setups in terahertz spectroscope are very difficult to construct due to the accuracy required in the positioning of the reference sample relative the sample of interest in order to ensure the reliability of the measurement. To circumvent this problem, we constructed an ellipsometer with no need for a reference sample. In this talk we will be discussing the terahertz time-domain spectroscopic ellipsometer we have constructed, as well as measurements performed with this setup.
Summary
In this talk we will be discussing the terahertz time-domain spectroscopic ellipsometer we have constructed, as well as measurements performed with this setup.
Main supervisor (name and email)<br>and his / her institution
Pieter Neethling
pietern@sun.ac.za
Stellenbosch University - Physics Department
Laser Research Institute
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
PhD
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
No
Primary author
Mr
Shane Smith
(Physics Post Graduate Student)
Co-authors
Prof.
Erich Rohwer
(University of Stellenbosch)
Dr
Pieter Neethling
(Laser Research Institute, University of Stellenbosch)
