Technique - (41) Photoluminescence / time-resolved PL

Type: Experimental

Description: Steady-state and time-resolved photoluminescence for characterizing optical transitions in materials.

Department(s)/lab(s): Chemistry / PME | Alivisatos Lab @ UChicago
Summary:

Pioneer in nanocrystal science. Sensing-relevant directions: (1) coherent Er spin defects in colloidal nanocrystal hosts as scalable solid-state spin qubit platform (2024 paper with Awschalom); (2) size- and shape-controlled nanocrystal synthesis for mid-IR sensing applications; (3) fundamental scaling laws governing optical properties for sensor design. Founder Nanosys and Quantum Dot Corp.

Department(s)/lab(s): Chemistry | PPSM - Luminescent Molecular Materials (Allain) @ ENSPS
Summary:

Allain (PPSM) designs luminescent and mechanofluorochromic molecular materials and lanthanide/organic probes acting as optical stress and environment sensors, including solid-state and time-resolved luminescence readouts. In the broader landscape of NV-centre ensemble quantum sensing (DEER, nano-NMR, T1 relaxometry) operating near pT/sqrt(Hz) sensitivity, this work is complemented by stimuli-responsive molecular luminescent sensors.

Department(s)/lab(s): Physics (Cavendish Laboratory – AMOP Group) | Quantum Optical Materials and Systems (QOMS) @ Cambridge
Summary:

AtatΓΌre leads the ~30-person QOMS group at the Cavendish. Three main thrusts: (1) Spin-based quantum networks β€” demonstrating distant entanglement generation and photonic cluster states using semiconductor quantum dots (InGaAs, GaAs) and diamond spin defects (NV, SiV, SnV), including a many-body nuclear-spin quantum register demonstrated in 2025 (Nature Physics); (2) Quantum-enhanced nanoscale sensing β€” scanning NV diamond magnetometry of emergent magnetism in novel 2D/layered materials and quantum transport in nanocircuits, plus nanodiamond-based in-cell sensing (nanoMRI, thermometry, diffusion in C. elegans); (3) Novel quantum materials β€” hexagonal boron nitride (hBN) optically-active spin defects at room temperature, and moirΓ© physics in TMD heterostructures. He is co-founder and CSO of Nu Quantum Ltd.

Department(s)/lab(s): Physics / PME | Awschalom Group @ UChicago
Summary:

Pioneer in spintronics and quantum information engineering. Research spans: (1) NV-center spin qubits in diamond for quantum sensing and communication including nanomagnetic imaging; (2) spin defects in SiC and Er-doped hosts for quantum network nodes at telecom wavelengths; (3) molecular and protein-based spin qubits (2025 fluorescent-protein spin qubit, Physics World Top-10); (4) coherent Er spin defects in colloidal nanocrystal hosts (2024, with Alivisatos). Founding Director Chicago Quantum Exchange. Joint Senior Scientist Argonne. Large infrastructure-rich group with strong industry ties (IBM, Intel, Google quantum).

Department(s)/lab(s): Physics & Astronomy – AMOPP | Bain Lab (Femtosecond Laser Spectroscopy and Super-Resolution Biosensing) @ UCL
Summary:

Bain develops advanced laser spectroscopy and super-resolution microscopy techniques for biological applications. Research directions: (1) Femtosecond time-resolved STED (stimulated emission depletion) β€” combining sub-diffraction spatial resolution with picosecond time resolution to study FRET dynamics in live cells with both spatial and lifetime precision; (2) Time-resolved polarized fluorescence β€” probing orientation distributions and rotational dynamics of fluorophores; (3) CW STED fluorescence lifetime reconstruction β€” lower-photodose STED for longer live-cell imaging; (4) Single-molecule FRET to study protein-protein interactions; (5) Single-particle tracking of membrane receptors relevant to viral entry and cancer signaling. Former PhD students include SiΓ’n Culley (now King's College, SMLM).

Department(s)/lab(s): Physics / C2N (Centre de Nanosciences et Nanotechnologies) | Quantum Fluids of Light Group (Bloch Lab, C2N) @ Paris-Saclay
Summary:

Jacqueline Bloch leads a world-leading group on semiconductor exciton-polariton physics at C2N/Paris-Saclay. Research: (1) polariton condensation and quantum fluids of light β€” superfluidity, vortices, analogue gravity; (2) topological insulator physics with polaritons; (3) quantum simulation with polariton lattices; (4) fundamental quantum optics of polariton systems. IQUPS co-organiser; C2N head. Key for light-physics sensing relevant to quantum fluids and topological photonics.

Department(s)/lab(s): Electrical & Electronic Engineering – Photon Science Institute | Boland Group (THz Semiconductor and 2D Materials Spectroscopy) @ Manchester
Summary:

Boland's group focuses on THz spectroscopy of semiconductor nanostructures and 2D materials for quantum sensing applications. Research directions: (1) THz optical pump–THz probe spectroscopy β€” measuring ultrafast carrier dynamics in semiconductor nanowires, quantum wells, and 2D materials (graphene, TMDs, perovskites) after optical excitation; (2) Near-field THz nanoscopy β€” sub-wavelength THz imaging of carrier distributions and quantum phase domains; (3) THz-active quantum devices β€” studying exciton and polaron dynamics in perovskite and III-V semiconductors at THz frequencies; (4) 2D material sensors β€” graphene-based THz detectors and emitters. Applications in quantum-material characterization and quantum sensing.

Department(s)/lab(s): School of Physics (joint with Electrical and Electronic Engineering) | Crozier Nanophotonics Laboratory @ UMelb
Summary:

Crozier holds a joint Physics/Electrical Engineering chair and runs a nanophotonics laboratory spanning plasmonic and dielectric metasurfaces, on-chip optical trapping and manipulation of nanoparticles and cells, mid-infrared spectroscopy and detection with metasurface-enhanced and colloidal-nanocrystal devices, and light emission from 2D semiconductors. The unifying theme is engineering the local optical density of states to increase the signal available from a very small number of emitters or molecules. Positioned against the established body of NV-ensemble quantum sensing work β€” DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity β€” the plasmonic and dielectric antenna work is the same physics used to raise photon collection efficiency and hence the shot-noise floor of NV-ensemble magnetometers operating at pT/sqrt(Hz). Note: a substantial fraction of the group's output is device fabrication rather than sensitivity-limited measurement, which is a caveat against the stated preference.

Department(s)/lab(s): Electrical & Electronic Engineering – Photon Science Institute | Curry Group (Advanced Electronic Materials and Quantum Technologies) @ Manchester
Summary:

Curry's group works on advanced electronic materials with emphasis on quantum technology applications. Research directions: (1) Single-ion implantation and detection β€” using P-NAME (Manchester's unique instrument for ion implantation at 20 nm accuracy) to deterministically place single rare-earth ions (Er3+, Pr3+) in photonic substrates for quantum memory and sensing; (2) Er:Si and Er:SiO2 photonics β€” developing silicon-compatible Er-doped waveguides and cavities emitting at 1.5 Β΅m for quantum network interfaces; (3) Colloidal quantum dots for sensing β€” photon-number-resolved detection using InAs QDs; (4) Ion beam technologies β€” SIMS and focused ion beam for quantum material characterization and fabrication. Access to P-NAME facility is unique in UK.

Department(s)/lab(s): Physics – Institute for Quantum Electronics | Quantum Optoelectronics Group (Faist Group) @ ETH Zurich
Summary:

Faist is the inventor of the quantum cascade laser (QCL, 1994 at Bell Labs) and leads the Quantum Optoelectronics Group at ETH. Research directions: (1) QCL frequency combs β€” ring QCLs demonstrate dissipative Kerr solitons in the THz (Science Advances 2023), key for broadband integrated mid-IR spectrometers; (2) Dual-comb spectroscopy β€” two co-integrated ring QCLs for ultrafast molecular fingerprinting; (3) Quantum cascade detectors β€” strain-compensated InGaAs/InAlAs QCDs for short-wave mid-IR (<4 Β΅m) sensing; (4) THz strong-coupling β€” ultrastrongly coupled 2DEG in cavities for quantum photonics; (5) Astrophysical heterodyne receivers β€” double-metal QCL Josephson mixers. Spin-off: IRsweep (mid-IR dual-comb systems) and Alpes Lasers (QCL commercialisation). FIRST Center head at ETH.