4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

Nonlinear optical processes and saturated absorption spectroscopy in two and multi-level atoms: a theoretical and numerical study

6 Jul 2016, 16:10
1h 50m
Kramer Law building

Kramer Law building

UCT Middle Campus Cape Town
Board: C.052
Poster Presentation Track C - Photonics Poster Session (2)

Speaker

Ms Meena Patel (Cape University of Technology)

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

In this presentation we report on the study of two-level and multi-level atoms interacting with one or more laser beams. The system is analyzed using the semi-classical approach where the dynamics of the atom is described quantum mechanically using the Liouville equation, while the laser is treated classically using Maxwell’s equations.
Firstly, we present results of a two-level atom interacting with a single laser beam and demonstrate Rabi oscillations between the two levels. We then examine the effects of laser modulation on the dynamics of the atom. Plots of the density matrix elements (population and coherence terms) as a function of time are presented for various parameters such as laser intensity, detuning, modulation etc. In addition phase-space plots and Fourier analysis of the density matrix elements are provided. The atomic polarization is estimated from the coherence terms. This, together with the populations, is used to determine the behavior of the laser beams as they pass through the atomic ensemble.
The behavior of the laser as it propagates through the atomic ensemble is studied by solving Maxwell’s equations numerically, initially with an assumed polarization and population from theory and later from the solution of the Liouville equation. The two-level system is further extended to include a second counter propagating laser beam and the effects of saturation and hole burning is demonstrated.
The above work will be expanded to simulate saturated absorption spectroscopy of Rubidium gas.

Main supervisor (name and email)<br>and his / her institution

Kessie Govender
govenderk@cput.ac.za
Cape Peninsula University of Technology

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MEng

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

yes

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

yes

Primary author

Ms Meena Patel (Cape University of Technology)

Co-authors

Prof. Gerhard de Jager (University of Cape Town) Dr Kessie Govender (Cape Peninsula University of Technology) Dr Zakhele Nkosi (Cape Peninsula University of Technology)

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