University of Illinois Urbana-Champaign

Stimulated Raman scattering, lasing, and molecular energy transfer mechanisms in KXe probed by laser spectroscopy

Desai, Kavita V

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https://hdl.handle.net/2142/121217

Description

Title
Stimulated Raman scattering, lasing, and molecular energy transfer mechanisms in KXe probed by laser spectroscopy
Author(s)
Desai, Kavita V
Issue Date
2023-07-07
Director of Research (if dissertation) or Advisor (if thesis)
  • Eden, J. Gary
  • Mironov, Andrey E
Doctoral Committee Chair(s)
  • Eden, J. Gary
  • Mironov, Andrey E
Committee Member(s)
  • Dragic, Peter D
  • Lorenz, Virginia O
  • Ruzic, David N
  • Zhao, Yang
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • Excimers
  • Laser Spectroscopy
Abstract
In laser spectroscopy experiments containing K-Xe vapor, collisional pairs are photoassociated to the B^2\mathrm{\Sigma}_{1/2}^+ and A^2\mathrm{\Pi} interatomic potentials. The combination of the shallow well of the KXe interatomic potentials along with the fine structure splitting of the K 4P states being ≪kT results in non-linear properties near the alkali D lines. Specifically in K-Xe vapor, stimulated Raman scattering has been observed, and its amplification is measured along with the excitation profile. This is the first demonstration of stimulated Raman scattering in both the alkali-rare gas molecules and a molecule with a dissociative ground state. Through these spectroscopy measurements, a high quantum efficiency laser/amplifier is engineered and physical properties of the KXe gain medium are characterized. Molecular features in KXe with fine resolution are also reported. In addition, the B^2\mathrm{\Sigma}_{1/2}^+ interatomic potential was also studied, and the state potential was modified using the Franck-Condon factor principle to include the blue satellite feature found in absorption and laser excitation experiments. Lastly, an excimer pumped alkali laser in KXe is demonstrated.
Graduation Semester
2023-08
Type of Resource
Thesis
Copyright and License Information
Copyright 2023 Kavita Desai

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