Optical free-induction decay of paramagnetic molecules in magnetic field

Evgeniy N. Chesnokov, Lev N. Krasnoperov, Vitaly V. Kubarev

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A systematic approach for the calculation of free-induction decay (FID) of paramagnetic species in time domain was developed. The approach allows the prediction of the temporal behavior of FID intensity and polarization in a magnetic field. The technique was illustrated with two examples, a stable paramagnetic molecule (NO) and a very reactive short-lived hydroxyl radical. The results of the calculations are in excellent agreement with available literature experimental data on NO molecule. Significant rotation of the polarization plane, even in a relatively weak magnetic field, potentially will allow selective detection of trace amounts of paramagnetic species (such as short-lived reactive free radicals) on a background signal originating from non-paramagnetic species typically present in great excess.

Original languageEnglish (US)
Article number015204
JournalLaser Physics
Issue number1
StatePublished - 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering


  • Zeeman effect
  • free electron laser
  • non-Faraday rotation
  • optical free induction


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