Fleming pioneered two-dimensional electronic spectroscopy and used it to reveal long-lived quantum coherences in photosynthetic light-harvesting complexes, work that reframed how energy transfer efficiency in natural and artificial light-harvesting systems is understood.
Prof. Gaynor (Chemistry, joined summer 2023) develops cutting-edge ultrafast spectroscopy at the physics-chemistry frontier. Directions: (1) Attochemistry — new ultrafast laser spectroscopies operating on attosecond to femtosecond timescales to directly measure how electron spin and orbital motion couple to molecular geometry (spin-vibronic coupling) in chiral molecules and materials of interest for energy conversion and spintronics; (2) Multidimensional nonlinear spectroscopy (2D electronic spectroscopy, 2D vibrational) to track energy and charge transfer immediately after photoexcitation; (3) Instrumentation-first approach: building novel attosecond transient absorption and correlation spectroscopy apparatus from scratch, enabling entirely new observables (e.g., electron-nuclear and spin-orbital correlations). INQUIRE faculty affiliate. Beckman Young Investigator 2025 ($600k, 4 yrs); Packard Fellow 2025 ($875k, 5 yrs).
Ginsberg's group devises new ultrafast electron- and optical-microscopy modalities to watch charge, energy, and structural dynamics in soft and hybrid materials (organic semiconductors, perovskites, biomolecular assemblies) on their native nanometer/femtosecond scales. The lab is actively recruiting postdocs to extend these methods toward operando imaging of energy materials.
Develops all-glass optical microresonator (microtoroid) platforms for label-free single-molecule and single-particle spectroscopy, extending single-molecule methods beyond fluorescent labels to study catalysis, protein folding, and photovoltaic materials.
Halsall is a senior PSI photonics researcher focusing on semiconductor spectroscopy and photonic quantum device characterization. Research directions: (1) Deep-level transient spectroscopy (DLTS) — characterizing defects and impurities in semiconductor quantum device structures (Si, GaN, SiC) that are relevant to qubit coherence; (2) Photoluminescence mapping — spatial mapping of optical quality in quantum well and dot wafers for quantum sensing device development; (3) InGaN/GaN quantum wells — non-destructive optical characterization of LED and sensor structures; (4) THz and infrared spectroscopy — contactless Hall measurements and Drude response for quantum material characterization. Provides photonic metrology tools for characterizing quantum sensing device materials.
Heinze designs earth-abundant luminescent metal complexes -- the 'molecular ruby' (Cr(III)) family and its Mo(III) NIR-II-emitting analogues -- and studies their excited-state dynamics with time-resolved luminescence, ultrafast spectroscopy and EPR, in collaboration with spin-spectroscopy groups including van Slageren at Stuttgart. Applications targeted include optical sensing (oxygen, pressure, temperature), NIR-II imaging in the tissue-transparency window, and photocatalysis. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), this is a dye/label-based sensing inclusion rather than a spin-defect one: the emphasis is on engineering the emitter's photophysics so that lifetime and intensity report on the local environment, which is directly comparable to nanodiamond thermometry/relaxometry but at the molecular scale.
Hibberd holds an EPSRC Ernest Rutherford Fellowship at Manchester's PSI. Research directions: (1) Ultrafast THz spectroscopy of magnetic materials — probing spin dynamics, magnon modes, and phase transitions in correlated magnetic materials with sub-ps time resolution using intense THz pulses; (2) THz-driven spintronics — using THz electric and magnetic fields to switch magnetization and induce spin currents; (3) THz generation from spintronic heterostructures — using ultrafast spin-charge conversion as a broadband THz emitter for materials characterization; (4) Quantum magnonics — studying collective spin excitations (magnons) as quantum sensors of materials order parameters. Bridges ultrafast optics and quantum sensing of magnetic phases.
Hutchison works on molecular polaritonics: what happens to chemistry when molecular electronic or vibrational transitions are strongly coupled to a confined optical mode in a Fabry-Perot or plasmonic nanocavity. He was among the first to show that vibrational strong coupling modifies ground-state chemical reactivity, and the group continues to probe polariton-modified energy transfer, photochemistry and transport, alongside single-molecule spectroscopy and 2D-material photonics. Positioned against the established body of NV-ensemble quantum sensing work — DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity — the connection to quantum sensing is the cavity: the same Purcell and collective-coupling physics that concentrates optical density of states around a molecule is what is used to improve photon collection and readout fidelity in NV ensembles operating at pT/sqrt(Hz). This is fundamental light-matter physics with a clear nonclassical-state angle.
Studies molecular and nano-optics, plasmonics, and near-field light-matter interactions, using super-resolution optical imaging to reveal active sites and phase transformations in heterogeneous catalysis and single nanodomains.
Kassal is the leading Australian theorist of quantum effects in light harvesting. He established the distinction between coherent processes and coherent states in photosynthesis — showing that under incoherent sunlight at steady state, wavelike motion per se does not enhance efficiency, while environment-assisted transport and supertransfer genuinely can — and has since developed a classification of the mechanisms by which coherence (excitonic, vibrational, or of the light field itself) can improve energy transport. He also pioneered quantum-computer algorithms for chemistry. A distinct and directly relevant thread is the theory of spectroscopy with non-classical light: what entangled or squeezed photons can reveal about molecular coherence that classical light cannot. Positioned against the established body of NV-ensemble quantum sensing work — DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity — his work is the theoretical counterpart to the quantum-biology ambitions of the NV community: where NV ensembles at pT/sqrt(Hz) try to detect the magnetic signatures of biological spin chemistry, Kassal asks what quantum coherence is actually doing in those systems and whether quantum light can interrogate it.