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High resolution continuous wave spectroscopy of the A <sup>2</sup>Σ<sup>+</sup> ← X <sup>2</sup>Π<sub>3/2</sub> transition in nitric oxide

ORAL

Abstract

Within the scope of the development of a new kind of gas sensor [1,2], we employ Doppler-free saturated absorption spectroscopy on the A 2Σ+ ← X 2Π3/2 transition in nitric oxide (NO) for different total angular momenta J on the P12 branch. Spectroscopy is performed in continuous wave operation at 226 nm in a 50 cm long through-flow cell. Via phase sensitive detection by a lock-in amplifier the hyperfine structure of the X 2Π3/2 state of NO is partially resolved. The data is compared to previous measurements [3], showing good agreement. Investigation of the dependence of the spectroscopic feature on power and pressure, should yield hyperfine constants, natural transition linewidth and the collisional cross-section between NO molecules.

[1] P. Kaspar et. al., OSA Optical Sensors and Sensing, 19-23 July, 2021

[2] J. Schmidt et. al., Appl. Phys. Lett. 113, 01113 (2018)

[3] W.L. Meerts and A. Dymanus, J. of Mol. Spec. 44, 320-346 (1972)

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Presenters

  • Philipp Neufeld

    5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

Authors

  • Fabian Munkes

    5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

  • Patrick Kaspar

    5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

  • Philipp Neufeld

    5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

  • Lea Ebel

    5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

  • Yannick Schellander

    Institute for Large Area Microelectronics, University of Stuttgart

  • Robert Loew

    University of Stuttgart, 5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

  • Tilman Pfau

    University of Stuttgart, 5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart

  • Harald Kuebler

    University of Stuttgart, 5th Institute of Physics and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart