Mulvaney directs the ARC Centre of Excellence in Exciton Science and runs Melbourne's nanoscience laboratory. The group's distinctive capability is single-particle and single-emitter optical spectroscopy: photon-antibunching and blinking statistics from individual quantum dots and perovskite nanocrystals, photothermal and dark-field spectroscopy of individual metal nanoparticles, and the electrochemical control of single-nanocrystal charge state. Applications run from LEDs and solar cells to quantum-dot probes for single-particle tracking in cells. 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 single-emitter photon-statistics measurements share the shot-noise-limited photon-counting methodology of NV-ensemble ODMR readout, and the group's nanocrystal probes are direct competitors/complements to nanodiamond in cellular sensing. Large, well-resourced group.

Murthy leads the Nanoscale Quantum Optics group at ETH, studying light-matter interactions in nanostructures to engineer novel quantum states of light. Research directions: (1) Photon-photon interactions — achieving strong effective photon-photon interactions via coupling to quantum emitters in 2D materials and optical nanocavities; exploring photonic Mott insulators and collective quantum phases of light; (2) 2D semiconductor quantum emitters — localized excitons in TMD heterostructures as sources of single photons and entangled photon pairs; (3) Quantum light from cavities — engineering photon statistics and squeezing using cavity-QED with 2D materials; (4) Ultrafast quantum optics — attosecond-scale probing of light-matter entanglement. New group as of ~2023.

Natrajan's group develops luminescent lanthanide complexes for chemical and biological sensing. Research directions: (1) Time-gated lanthanide luminescence sensing — long-lifetime Eu3+, Tb3+, and Yb3+ complexes with millisecond emission lifetimes for background-free sensing in cells and tissue; (2) Intracellular sensing — luminescent probes for sensing O2, pH, viscosity, and specific enzymes inside living cells with spatiotemporal resolution; (3) Chiral discrimination — circularly polarized luminescence (CPL) from Eu3+ complexes for enantioselective sensing; (4) Responsive probes — switchable lanthanide complexes as ratiometric sensors for biomedical imaging. The long-lifetime emission enables time-gating strategies analogous to quantum sensing protocols.

Ruth Oulton's group works on quantum photonics using solid-state single-photon emitters. Research: (1) semiconductor quantum dot single-photon sources — cavity-enhanced emission, photonic crystal integration; (2) hBN defect spin-photon interfaces; (3) integrated quantum photonics for sensing and quantum networks. The group focuses on device-quality semiconductor photonic systems for quantum information and sensing applications.

Palomba works on nonlinear nanophotonics and plasmonics: exploiting the extreme field confinement of metallic and hybrid nanostructures to obtain efficient frequency conversion, second- and third-harmonic generation and four-wave mixing in device footprints far smaller than conventional nonlinear optics allows, and integrating these with silicon photonics. The applications the group targets include on-chip nonclassical light generation and nanoscale sensing. 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 plasmonic field-enhancement physics is the same toolkit used to build the nanoantennas that raise photon collection from single NV centres and thereby move single-defect sensing toward the pT/sqrt(Hz) performance of ensembles. Borderline inclusion; the group is device-centred, which cuts against the stated preference.

Parigi co-leads the Multimode Quantum Optics group at LKB alongside Treps. Research directions: (1) Multimode squeezed-state quantum networks — generating large-scale entangled cluster states using optical frequency combs; reconfigurable graph-state topologies for measurement-based quantum computing and distributed quantum sensing; (2) Multimode quantum sensing — using multimode squeezed states for simultaneous beyond-shot-noise estimation of multiple parameters (wavelengths, phases) in a spectrometer; (3) Non-Gaussian quantum states — heralded subtraction and addition of photons to Gaussian cluster states for universal CV quantum computation; (4) Quantum networks at telecom — generating multimode squeezed states compatible with fiber transmission. ERC Laureate. Employed by Sorbonne Université.

Parkinson's group uses ultrafast optical spectroscopy to study carrier dynamics in photonic materials with quantum device applications. Research directions: (1) Time-resolved photoluminescence — TRPL with single-photon counting to map exciton lifetimes, diffusion, and defect trapping in GaN, perovskite, and 2D semiconductor quantum wells; (2) Optical single-particle spectroscopy — isolating single nanowires or nanocrystals for defect-free measurements of intrinsic optical properties; (3) Photon-number statistics — Hanbury Brown–Twiss measurements of single-photon purity from quantum dots and localized excitons; (4) Semiconductor quantum sensing interfaces — studying how carrier dynamics affect the fidelity of semiconductor-based quantum sensors and emitters.

Unnithan runs a sensor-engineering group spanning plasmonic colour filters and metasurface-based CMOS image and spectral sensors, thermal/hyperspectral cameras, machine learning on sensor data, and — the relevant thread here — the engineering and packaging of quantum diamond magnetometers, in a joint programme with the Melbourne physics groups and Phasor Innovation aimed at navigation, subsurface sensing and eventual healthcare use. He has extensive industry links (Hort-Eye, KDH) and an entrepreneurial orientation. 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 role in that collaboration is on the readout, optics and integration side rather than the spin physics, i.e. turning a laboratory pT/sqrt(Hz) NV ensemble into a fielded instrument. Caveat against the stated preference: this group is substantially device-fabrication and product-oriented rather than sensitivity-limited fundamental measurement.

Reece runs UNSW's optical trapping and nanophotonics laboratory. The group combines optical tweezers with spectroscopy and microfluidics to characterise individual nanoparticles and cells: trapping and spectroscopically interrogating plasmonic core-satellite assemblies (with Gooding and Tilley), measuring single-cell mechanics, and building porous-silicon and photonic-crystal resonant structures for label-free biosensing where the analyte shifts a cavity resonance. 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 — optical trapping is the standard way to hold a nanoscale sensor — including a nanodiamond hosting an NV ensemble at pT/sqrt(Hz) — at a controlled position inside a cell or fluid, and levitated-nanodiamond spin-mechanics is an active field that this group's capabilities map onto almost exactly. Strong practical fit for a bio-oriented quantum sensing candidate.

Schueder is a newly appointed (2025) EPFL Assistant Professor specializing in high-resolution microscopy and its biological applications. He played a key role in the development of DNA-PAINT, a super-resolution microscopy technique enabling nanometer-scale (~5 nm) visualization of cellular structures via transient programmable DNA hybridization. Research directions: (1) DNA-PAINT super-resolution — multiplexed, quantitative imaging of protein complexes in fixed and living cells with Exchange-PAINT; (2) Single-molecule localization below 5 nm resolution — resolving individual proteins within complexes; (3) Biological applications — imaging cytoskeletal networks, receptor clustering, chromatin organization; (4) Expanding to in situ structural biology — correlating super-resolution images with cryo-EM data. Transferred from ETH Zurich. Strong fit with EPFL imaging and structural biology ecosystem.