QTBW_THz

Fabrication of a Silicon-Glass Anodically Bonded Vapor cell for Terahertz Sensing

01/02/2022 to 31/07/2022

This project aims to fabricate a new rubidium vapor cell compatible with both terahertz and visible wavelengths. This is a key element needed for the development of a terahertz sensor based on rubidium Rydberg atoms in a vapor cell. The terahertz radiation is provided by a quantum cascade laser with emission at 3 THz.
The cell will be based a Silicon window for THz radiation and borosilicate glass window for the lasers which excite the atoms into Rydberg states. It will be fabricated using the facilities of Stuttgart for Anodic Bonding and later on fill up with rubidium and spectroscopically tested in Tübingen.
Investigations on Parylene AR coating on the silicon window to improve the transmission of terahertz will be investigated for the first time and its compatibility with rubidium atoms. The results will be implemented in the cell fabrication.