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

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2023

Author dc:creator

• Desai, Kavita V

Contributors dc:contributor

• Eden, J. Gary
• Mironov, Andrey E
• Dragic, Peter D
• Lorenz, Virginia O
• Ruzic, David N
• Zhao, Yang

• Laser Spectroscopy
• Excimers

Statement dc:rights

• Copyright 2023 Kavita Desai

Language dc:language

en, eng

Handle dc:identifier

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

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F121217