Demsar's group studies non-equilibrium dynamics in quantum materials with ultrafast optical and terahertz probes: THz time-domain spectroscopy, optical pump-probe and time-resolved photoemission applied to superconductors, charge-density-wave systems and magnetic materials, including light-induced phase transitions and the dynamics of collective modes. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), this is a borderline inclusion -- it is not quantum sensing per se -- but it is kept because the group's core competence is pushing temporal resolution (fs) and coherent THz detection to their limits, which is a legitimate adjacent skill set and a plausible pivot for someone with lock-in/pulsed-measurement expertise.

Studies atomically thin 2D quantum materials and their sensing applications. Directions: (1) tr-ARPES and ultrafast spectroscopy of non-equilibrium electronic dynamics in TMDs and graphene heterostructures; (2) 2D material nanophotonic devices for light sensing and emission; (3) wafer-scale CVD growth of hBN, MoS2, WSe2 for integrated quantum devices; (4) scanning probe characterization of local optical and electronic properties. Key tool: time-resolved photoemission as ultrafast electronic structure sensing.

Uses MBE thin-film growth combined with equilibrium and non-equilibrium ARPES to sense electronic structure at material interfaces. Directions: (1) non-equilibrium photoemission (tr-ARPES) to map ultrafast electron dynamics in topological and superconducting materials; (2) MBE engineering of interfacial superconductivity and topological orders at oxide and chalcogenide interfaces; (3) light-induced phase transitions probed by ultrafast ARPES as a sensing modality for correlated electron dynamics.