Project Details

Monolayer transition metal dichalcogenides (M-TMDs) are prototypical van der Waals materials with remarkable excitonic properties that make them highly promising for nextgeneration optoelectronics and quantum technologies. However, the coexistence of multiple quasiparticles (neutral excitons, trions, localized states) often limits device performance at both room and cryogenic temperatures. A novel route to overcome this challenge is the use of twisted light—non-Gaussian optical beams carrying spin and orbital angular momentum (OAM, ℓ). This project aims to: • Generate and control twisted light beams with tunable OAM values. • Develop an in-house cryogenic spectroscopy setup to probe excitonic and valley dynamics under twisted-light excitation. • Fabricate and study Q-TWIST devices, consisting of magnetic thin film/TMD heterostructures, where optical angular momentum can mediate spin qubit control. The scientific impact lies in revealing how angular momentum from light transfers into 2D excitonic systems, modifying spin–orbit interactions, intervalley scattering, and phonon generation. Understanding these mechanisms will allow the design of optically driven spintronic and valleytronic devices operable at room temperature. The PI brings expertise in exciton control, nonlinear optical techniques, in-situ holography-based sensors, and fabrication of TMD heterostructures. This Marie Skłodowska-Curie project strengthens skills in twisted light–matter interactions, exciton–phonon coupling, and spin-qubit engineering, thereby contributing to Europe’s leadership in quantum optoelectronics.