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PreprintCC BY 4.0arXiv

Preparing State-Selected Molecular Beams with high Efficiency using Quantum Cascade Lasers

  • Ardra P. S.
  • Pranav R. Shirhatti
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Abstract

We demonstrate the ro-vibrational state-selective preparation of CO molecules (v = 0, J = 0 → v = 1, J = 1) in an internally cold molecular beam using a continuous-wave, narrow-linewidth distributed feedback type quantum cascade laser, with an output wavelength of 4.65 μm. Using a modulation-free wavelength stabilization scheme, we show that population transfer to near saturation levels can be obtained with sufficient long term stability, as needed for state-resolved scattering experiments. We show preliminary results of CO molecules prepared in the v = 1 state, scattering from a clean Cu(100) surface. This study showcases the promise of QCL based excitation for state-selected molecular beam based scattering experiments, especially involving transitions in the mid-infrared domain (λ > 4.5 μm) which are otherwise difficult to access using conventional sources.

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Cite

BibTeXRIS
BibTeX
@misc{p2026preparing,
  title = {{Preparing State-Selected Molecular Beams with high Efficiency using Quantum Cascade Lasers}},
  author = {Ardra P. S. and Pranav R. Shirhatti},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.34948},
  eprint = {2610.34948},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.34948},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Preparing State-Selected Molecular Beams with high Efficiency using Quantum Cascade Lasers
AU  - Ardra P. S.
AU  - Pranav R. Shirhatti
PY  - 2026
DA  - 2026/10/26
PB  - arXiv
DO  - 10.48550/arxiv.2610.34948
UR  - https://arxiv.org/abs/2610.34948
AB  - We demonstrate the ro-vibrational state-selective preparation of CO molecules (v = 0, J = 0 → v = 1, J = 1) in an internally cold molecular beam using a continuous-wave, narrow-linewidth distributed feedback type quantum cascade laser, with an output wavelength of 4.65 μm. Using a modulation-free wavelength stabilization scheme, we show that population transfer to near saturation levels can be obtained with sufficient long term stability, as needed for state-resolved scattering experiments. We show preliminary results of CO molecules prepared in the v = 1 state, scattering from a clean Cu(100) surface. This study showcases the promise of QCL based excitation for state-selected molecular beam based scattering experiments, especially involving transitions in the mid-infrared domain (λ > 4.5 μm) which are otherwise difficult to access using conventional sources.
ER  -