Lee leads TheLeeLab at Cambridge Chemistry, focused on developing cutting-edge biophysical single-molecule fluorescence methods to answer fundamental biological questions. Two major thrusts: (1) 3D super-resolution microscopy instrument development — the lab pioneered single-molecule light field microscopy (SMLFM) using a microlens array in the back focal plane, achieving ~10× speed improvement over double-helix PSF for volumetric imaging; also develops vortex light field microscopy (VLFM) for simultaneous 25 nm spatial / 3 nm spectral precision; (2) Biological applications — studying T-cell receptor signalling at the nanoscale (distribution of TCRs, microvilli-mediated close contacts), histone assembly during DNA replication and repair in fission yeast, and PSD-95 nanoclusters in mouse brain using 3D SMLM. A job posting (PDRA) was active in 2025 for T-cell imaging work with super-resolution and Fourier light-field microscopy.