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MO: Fachverband Molekülphysik
MO 26: Poster – Cold Molecules (joint session MO/Q)
MO 26.4: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Technology for spatially resolved spectroscopy of Rydberg states in nitric oxide — •Hanna Lippmann1, Yannick Schellander2, Fabian Munkes1, Alexander Trachtmann1, Florian Anschutz1, Ettore Eder1, Meriem Mavlutova1, Robert Löw1, Patrick Schalberger2, Norbert Fruehauf2, Harald Kübler1, and Tilmann Pfau1 — 15th Institute of Physics, University of Stuttgart, Germany — 2Institute for Large Area Microelectronics, University of Stuttgart, Germany
High-resolution continuous-wave (cw) laser spectroscopy of nitric oxide (NO) molecules has been performed to study and characterize the energy-level structure. Special focus is on effects of electric fields on high Rydberg states. In contrast to theory, the measurements show states with no frequency shift. The reason for this effect is most likely an inhomogeneous electric field distribution. This is caused by field attenuations near the cell walls resulting from charge carrier accumulations on these. Therefore, Rydberg states near the cell walls experience a much lower electric field than expected. To further investigate the charge carrier effects and prove the given explanation, spatially resolved measurements of the ionization currents are performed. These kinds of measurements are enabled by an electrode / transimpedance amplifier array based on thin-film technology. The focus is on the creation of current to voltage converting circuits using amorphous indium gallium zinc oxide as semiconductor. The same technology can be used to efficiently detect the ground state transition laser or uv light in general.
Keywords: High-resolution laser spectroscopy; Ionization current detection; Nitrix oxide; Spatially resolved sensing; High efficient UV photodetection