Research
Nanomaterials
We use pump/probe spectroscopy to study how light and matter interact on femtosecond to nanosecond timescales. Using visible probes we can track electronic processes, while infrared radiation lets us study vibrational states of molecules and atomic-scale defects in semiconductors.
Recent papers:
Terahertz harmonic generation and nonlinear spectroscopy of metamaterial-gated/graphene resonators
Tunable Photoluminescence from Monolayer Molybdenum Disulfide
Terahertz medical imaging
Performing in vivo studies of the THz properties of skin is a major initiative in the group, supported by the EPSRC Terabotics Programme GrantLink opens in a new window. We develop robust measurement protocols and test them on a statistically significant number of patients, cross-checking with other methods.
Recent papers:
Past, present and future of in vivo THz skin sensing
All-fibre-coupled terahertz single-pixel imaging for biomedical applications
Robotically Controlled Terahertz Probe for In Vivo Skin Evaluation: Imaging with the PicoBot
Semiconductors and Energy materials
A major strand of our research is to improve our knowledge of the fundamental science underpinning new semiconductor materials, such as metal-halide perovskites, which are often attractive for photovoltaic applications.
Recent papers:
Vibrational Energy Transfer in Organic Semiconductors Revealed by Infrared Pump–Probe Spectroscopy
An Ultrafast Investigation of the Surface and Bulk Passivation Effects of Phenylethylammonium in CH3NH3PbI3 Thin Films
Structural chemistry of the n = 3 Dion–Jacobson phases: controlling polarity and band gap
Terahertz devices and techniques
We develop new THz devices and integrate them into novel systems designs that can perform THz imaging and THz spectroscopy faster, and with increased capabilities (e.g. polarisation control; robot-controlled probes).
Recent papers: