Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 41: Poster Session IIIa
A 41.4: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Orangerie
Towards a shotnoise limited optogalvanic vapor cell — •Markus Fiedler1,5, Johannes Schmidt1,5, Ralf Albrecht1,5, Patrick Schalberger2,5, Holger Baur2,5, Robert Löw1,5, Harald Kübler1,5, Denis Djekic3,5, Jens Anders4,5, Norbert Frühauf2,5, and Tilman Pfau1,5 — 15th Institute of Physics — 2Institute for Large Area Microelectronics — 3Institute for Microelectronics, University of Ulm — 4Institute for Theory of Electrotechnology — 5University of Stuttgart, Center for Integrated Quantum Science and Technology (IQST)
We show how we want to integrate a shotnoise limited ion current
detection into an optogalvanic vapor cell. Such a device can be used
as a sensitive detector for electric and magnetic fields as well as highly
excited atoms and molecules. We excite Alkali Rydberg atoms in
an electrically contacted vapor cell [1,2]. These atoms are ionized
due to collisions with the background gas. A voltage directs these
charges towards the electrodes on the inside of the cell, where they are
detected with an amplification circuit.
Those circuits need to provide stable, low noise amplification under changing environmental
conditions.
Circuits based on thin film [3] and CMOS [4] technology are proposed. Furthermore, a random sampling Lock-In method aimed at achieving high bandwidth is discussed.
[1] D. Barredo, et al., Phys. Rev. Lett. 110, 123002 (2013)
[2] R. Daschner, et al., Opt. Lett. 37, 2271 (2012)
[3] P. Schalberger, et al., JSID 19, 496-502 (2011)
[4] D. Djekic, et al., ESSCIRC 43, 1386 (2017)