Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 31: Poster Session III
A 31.28: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG1
An optogalvanic flux sensor for trace gases based on Rydberg excitations — •Ralf Albrecht1, Johannes Schmidt1,2, Patrick Schalberger2, Holger Baur2, Robert Löw1, Tilman Pfau1, Norbert Frühauf2, and Harald Kübler1 — 15. Physikalisches institut, IQST, University of Stuttgart — 2Institute for Large Area Microelectronics, IQST, University of Stuttgart
Rydberg atoms in thermal vapor are discussed as promising candidates for the realization of quantum devices such as single photon sources and sensors [1]. One example for a classical application could be a gas sensor. We want to exploit the low binding energy of Rydberg states in atoms or molecules which are easily ionized by collisions with other gases. This allows us to convert the optical excitation of the trace gas directly into charges and subsequently measure a current with low background signal [2]. This method of detecting a trace gas is very selective, due to the excitation into a bound state which gets ionized only afterwards. Furthermore, a sensitivity better than parts per million seems to be in reach. As we are able to include electronic devices ranging from simple electrode structures to complex circuits like operational amplifiers [3] into the cell, this sensitivity can be further improved.
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