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HEP-Astro Seminar | Intensity Correlation Speckles as a Novel
Technique to Remove Spectral Noise

Noah Green (U-M Physics)
Monday, March 21, 2022
4:00-5:00 PM
335 West Hall Map
https://umich.zoom.us/j/91409362110?pwd=UDlja2FuYlZWVFNEMWFrOTlkWFNEZz09

The spectrum of a light source will always have noise due to the physical properties of the emitting system. The frequency of collisions between atoms, Doppler shifts due to random atomic velocities, and the time-energy uncertainty relation for atomic transitions are a few examples. These sources of noise will broaden the optical linewidth in a spectrum, often blurring emission lines together to be indistinguishable from one another. Resolving these lines generally requires direct manipulation of the source, either by reducing the amount of broadening (e.g. cooling) or by forcing an atomic transition where broadening is negligible, as was done in the famous Lamb-Retherford experiment. I will present recent work on a novel technique to resolve the frequency differences between collision and Doppler broadened spectral lines through measurement of the temporal second order correlation function g2 (𝜏). This technique would not require manipulation of the light source, which can potentially open up applications in fields where this would be impractical or impossible, such as astrophysics and cosmology.
Building: West Hall
Event Type: Workshop / Seminar
Tags: Physics, Science
Source: Happening @ Michigan from Department of Physics, HEP - Astro Seminars