Scattering of Orbital Angular Momentum Carrying States of Light

Paranjape, Atharva (2022) Scattering of Orbital Angular Momentum Carrying States of Light. Masters thesis, Indian Institute of Science Education and Research Kolkata.

Text (MS dissertation of Atharva Paranjape (17MS058)) 17MS058_Thesis_file.pdf - Submitted Version Restricted to Repository staff only Download (13MB)

Abstract

Structured light offers a playground of rich physics and finds many applications in modern technologies such as optical communication and imaging. Scattering of light during propagation through a medium poses a significant challenge during practical demonstrations of these technologies. Light carrying orbital angular momentum has been shown to be robust against scattering as compared to light having the standard gaussian mode. However till date there is no concrete analytical model which can explain these differences in the scattering properties. In this thesis we study the scattering properties of light carrying orbital angular momentum and work towards developing a complete understanding of the scattering properties of light. We carry out experiments in the classical as well as quantum regime in order to probe these properties at a fundamental level. Our results suggest that light with higher orbital angular momentum values show greater retention of polarization after propagation through scattering media. We also demonstrate the direct transfer of pump amplitude to parametric downconverted photons in presence of scattering.

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