Abstract Details

Name: Athira B S
Affiliation: CESSI, IISER Kolkata
Conference ID: ASI2020_466
Title : Single-shot Measurement of Space Varying Polarization State of Light via Quantification of Pancharatnam-Berry Geometric Phase
Authors and Co-Authors : Athira B S, Dibyendu Nandy and Nirmalya Ghosh
Abstract Type : Poster
Abstract Category : Instrumentation and Techniques
Abstract : Light beam carrying spatially varying state of polarization generates space varying Pancharatnam-Berry geometric phase while propagating through a homogenous anisotropic medium. We show that determination of such space varying geometric phase provides a unique way to quantify the space varying polarization state of light using a single shot interferometric measurement. We demonstrate this concept in a Mach-Zehnder interferometric arrangement using a linearly polarized reference light beam, where full information on the spatially varying polarization state is successfully recovered by quantifying the space varying geometric phase and the contrast of interference. The proposed method enables single-shot measurement of any space varying polarization state of light from the measured interference pattern with a polarized reference beam and thus obviates the need for multiple intensity measurements as required in conventional Stokes vector measurement method. This approach shows considerable potential for instantaneous mapping of complex space varying polarization of light in diverse applications, where high precision and near real-time measurement of spatial polarization patterns are desirable.