Measuring radial symmetries of Laguerre Gaussian beams and discussion of a non-destructive detection technique of spin relaxation of atoms in atomic vapors

November 09, 2021

Shrestha Biswas, Raman Research Institute, Bangalore, India
Group Seminar via video conference (Zoom)
Tuesday, November 9, 9:00 a.m (MEZ)

Due to the Covid-19 pandemic, the group seminar will be a hybrid event, allowing participants to attend the seminar virtually and in-person. This procedure enables us to continue our research, enhance discussions and exchange important information.


Laguerre Gaussian (LG) beams have discrete orbital angular momentum (OAM) and radial modes, and we can generate a beam adding these different modes using Spatial light modulators. Quantum technologies have extensively used the OAM modes due to their controlled vortex structures. Recently, researchers have shown interest in accomplishing application with the discrete radial modes of LG beam. This necessitates efficient detection of radial modes of a given beam. In the first part of my presentation, I will discuss my contribution in devising and implementing an interferometer that can interpret a source's spectrum in either only radial or both radial and OAM modes of LG beam.

In the second part, I will talk about a non-destructive detection technique of spin relaxation of atoms named Spin Noise Spectroscopy. Here I will describe my endeavors in setting up an experiment that can produce space-resolved information of this spin relaxation of atoms within an atomic vapor cell of Rubidium 87 and try to motivate this method as a non-destructive imaging technique.

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