Weak Measurements in Spin-Orbit Optical Systems: Fundamental Consequences and Application Prospects

Modak, Niladri (2023) Weak Measurements in Spin-Orbit Optical Systems: Fundamental Consequences and Application Prospects. PhD thesis, Indian Institute of Science Education and Research Kolkata.

Text (PhD thesis of Niladri Modak (16IP018)) 16IP018.pdf - Submitted Version Restricted to Repository staff only Download (10MB)

Abstract

The idea of quantum weak measurement and weak value amplification (WVA) has become attractive to the community working in classical and quantum optics due to its potential to amplify weak perturbation. WVA has been exploited in optics, specifically, to enhance tiny optical effects from the perspective of fundamental understanding and open up novel metrological applications. In this thesis, two different regimes in the domain of classical optics are exploited for the implementation of the WVA technique. Firstly, WVA is applied in a standard interferometer, which indicates a new concept of weak value amplified detection of tiny polarization anisotropy effects. Secondly, the platform of optical beam shifts is used to realize WVA, which enhances the fundamental understanding of the longitudinal and transverse optical beam shifts and their correlation. A tilted linear polarizer system, demonstrating similar beam shifts, is further demonstrated as a tunable micro beam deflector device. In a nutshell, this thesis incorporates the application of postselection aided quantum weak measurement in spin-orbit optical systems to extract new understandings of the corresponding physical systems and indicate potential applications.

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