Description: Non-linear laser excitation providing intrinsic optical sectioning for deep-tissue and in vivo imaging of labeled structures.
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).
PREFERRED. Boyden co-invented optogenetics and expansion microscopy, the latter physically swelling fixed tissue in a hydrogel to achieve nanoscale-resolution imaging on conventional diffraction-limited microscopes; his Synthetic Neurobiology Group continues to push these techniques (expansion revealing, thousandfold expansion microscopy) alongside genetically encoded voltage/activity indicators and brain-wide circuit mapping. The group's Media Lab page notes it is currently accepting new students.
Daan Brinks develops all-optical electrophysiology tools for neuroscience. His lab engineers genetically-encoded voltage indicators (GEVIs) and combines them with optogenetics to read out and control neural circuit activity. Key directions: (1) engineering bright, fast GEVIs with improved photostability and voltage sensitivity; (2) multiplexed all-optical neural circuit mapping; (3) identifying rare aggressive cancer cells using voltage-sensitive dyes. His voltage imaging approach represents cutting-edge biosensing at the intersection of photonics and neuroscience.
Dickinson's group develops advanced optical microscopy methods for biological and biomedical imaging. Research directions: (1) STORM super-resolution microscopy β stochastic optical reconstruction for nanoscale imaging of biological structures at ~20 nm lateral resolution; imaging cytoskeletal dynamics, cellular organelles, and pathological structures; (2) Optical coherence tomography (OCT) β depth-resolved, label-free imaging for biomedical diagnostics (retinal, cardiovascular tissues); (3) Laser speckle imaging β blood flow and perfusion measurements in tissues; (4) Multiphoton microscopy β second harmonic generation (SHG) and two-photon for collagen structure imaging in connective tissues and cancer. Part of the Manchester Photon Science Institute biophotonics theme.
Gigan leads the Optical Imaging group at LKB, pioneering wavefront shaping and computational imaging through scattering media. Research directions: (1) Wavefront shaping / transmission matrix β measuring the ~10^5 optical modes of a scattering sample's transmission matrix to focus and image through highly scattering biological tissues; roadmap on deep tissue imaging (J. Phys. Photonics 2022, lead author); (2) Multimode quantum optics through complex media β spatially multimode squeezed states transmitted through scattering media for quantum-enhanced imaging; (3) Optical computing / AI β using multiple scattering as a physical neural network for reservoir computing and nonlinear machine learning (LightOn spin-off, 2016); (4) Neurophotonics applications β focusing through the skull for deep brain imaging. Two ERC grants (2011, 2017). Optica Fellow. IUF member (2016β2021).
Sylvain Gigan's PICO (Photonics, Information, and Complexity) group focuses on imaging through and with complex and scattering media. Research: (1) wavefront shaping through scattering media β adaptive optics and transmission matrix approaches for deep-tissue fluorescence imaging; (2) multimode quantum optics through complex media β pushing quantum light through scattering and multi-mode fibres; (3) analogue computing with random optical scattering media. Key for biosensing: deep tissue imaging at high spatial resolution and quantum-enhanced light manipulation.
Jacob Hoogenboom develops integrated correlative light and electron microscopy (CLEM) and molecular nanophotonic imaging. Research: (1) 3-in-1 microscopy combining light, electron beam, and ion beam for precise biological sample sectioning and protein localisation; (2) integrated CLEM for mapping proteins in cellular context; (3) single-molecule nanophotonic sensing using fluorescence. Relevant to advanced single-molecule biosensing approaches.
Prof. Kozorovitskiy (Neurobiology) studies neuromodulation and plasticity in the striatum and basal ganglia, with a distinctive emphasis on developing and applying advanced optical imaging methods. Imaging technique innovations: (1) Oblique plane illumination (OPI / scanned oblique plane illumination, SOPi) microscopy β a single-objective light-sheet technique achieving tilt-invariant volumetric imaging for rapid 3D capture of fluorescently labeled neural structures without mechanical tilting; (2) Two-photon fluorescence imaging and two-photon glutamate/neuromodulator photorelease for single-synapse resolution in live tissue; (3) Near-infrared genetically-encoded calcium indicators (with Verkhusha group) for in vivo multi-color neural recording with reduced photobleaching. The lab's technical contributions are centered on extending the spatial and volumetric resolution of live-tissue fluorescence imaging. Irving M. Klotz Research Professor of Neurobiology; Beckman Young Investigator 2015.
Parkinson's group uses ultrafast optical spectroscopy to study carrier dynamics in photonic materials with quantum device applications. Research directions: (1) Time-resolved photoluminescence β 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 β isolating single nanowires or nanocrystals for defect-free measurements of intrinsic optical properties; (3) Photon-number statistics β Hanbury BrownβTwiss measurements of single-photon purity from quantum dots and localized excitons; (4) Semiconductor quantum sensing interfaces β studying how carrier dynamics affect the fidelity of semiconductor-based quantum sensors and emitters.
Schnitzer's lab invents miniaturized and fiber-based two-photon microscopes and voltage/calcium imaging methods that allow single-cell-resolution recording of neural activity in freely behaving animals, including recent wide-field fluorescence-lifetime voltage imaging developed with the Kasevich group for high-throughput readout of neuronal spiking.