- Continuous wave terahertz spectrometer as a noncontact thickness measuring deviceRafał Wilk
Institute for High Frequency Technology, Schleinitzstrasse, Braunschweig, Germany
Appl Opt 47:3023-6. 2008..We demonstrate that the thickness profile of a sample can be reconstructed from an acquired THz image...
- Liquid crystal based electrically switchable Bragg structure for THz wavesRafal Wilk
Institute for High Frequency Technology, Braunschweig, Germany
Opt Express 17:7377-82. 2009..It exhibits the 60 GHz broad stop-band around 300 GHz which can be removed by reorienting liquid crystal molecules in an external electric field. Our first proof-of-principle experiments agree very well with transfer matrix calculations...