Pratik Chakraborty

Pratik joined the group in July 2022. He initially worked on the characterisation of nano-structured mirrors, which can be used to realise the ancilla cavity (effective negative mass oscillator) for the group’s CQNC-scheme (Coherent Quantum Noise Cancellation). These mirrors have non-degenerate polarisation -dependent reflectivity for TE- and TM-polarisation at a given angle of incidence. When used as an I/O coupler in a cavity, this leads to different finesses for TE-polarisation (ancilla cavity field) and TM-polarisation (meter cavity) required for CQNC.

He is currently studying cavity optomechanics, as this is be crucial for making efficient progress along the lines of optomechanical integration at cryogenic temperatures for reaching quantum back action noise floor and thus demonstrating CQNC. His future work within the group will focus on micromechanical oscillator topologies, meta-materials and -membranes, and the realisation of a quantum back action (QBA) noise-limited system.

Pratik completed his Masters (M.Tech.) in Applied Optics from the Indian Institute of Technology (IIT), Delhi. However, the dissertation work for the graduate program was done at VLBAI (Very Long Baseline Atom Interferometry), Institute of Quantum Optics at Leibniz Universität Hannover, on the topic “Active Laser pointing stabilisation for long baseline Atom Interferometry”, under the supervision of Dr. Dennis Schlippert.