University of Illinois Urbana-Champaign

Interference between coherences established among the 5D5/2-5P3/2 and 5P3/2-5S1/2 energy levels within atomic rubidium

Reboli, Thomas

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https://hdl.handle.net/2142/115795

Description

Title
Interference between coherences established among the 5D5/2-5P3/2 and 5P3/2-5S1/2 energy levels within atomic rubidium
Author(s)
Reboli, Thomas
Issue Date
2022-04-29
Director of Research (if dissertation) or Advisor (if thesis)
Eden, James G
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
  • Quantum beat spectroscopy
  • Terahertz quantum beats
  • Ultrafast spectroscopy
  • Alkali
  • Vapor
  • Rubidium
  • Pump-probe
  • Time-frequency resolved
  • Wave packet
  • Interference
  • Coherent
  • Superposition
  • Controllability
  • Oscillators
Abstract
Coupling was observed between atomic coherences formed at 386.2 THz and 384.1 THz, corresponding respectively to the $5D_{5/2}-5P_{3/2}$ and $5P_{3/2}-5S_{1/2}$ energy differences in atomic Rb. These coherences were excited using ultrafast laser pulses, and their temporal dynamics observed through quantum beat spectroscopy. The coupling of these oscillators was observed as an interference window occurring in the spectral response of the pair's beat frequency. The spectral profile of these pairs was also observed to change with varying phase matching conditions. The profile was fit to a generalized Fano resonance to recover phase, which corresponds to degree of coupling between the states. The profile was also found to change with experimental parameters, giving control over the coupling parameters.
Graduation Semester
2022-05
Type of Resource
Thesis
Copyright and License Information
Copyright 2022 Thomas Reboli

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