James Lloyd-Hughes

Research overview

My research group uses ultrafast spectroscopy techniques to investigate the physics of novel materials on short time scales of around one picosecond. We also develop sources and detectors of terahertz radiation. I am part of the Ultrafast & Terahertz Photonics group in the Physics Department. Please see a list of our recent publications for more details on my research. I also direct the Warwick Centre for Ultrafast Spectroscopy, a facility for UV, visible, IR and THz ultrafast spectroscopy, and which is one of the university's Research Technology Platforms.

Funded PhD studentships: Please contact me if you are interested in a PhD in these areas.

Ultrafast spectroscopy

Terahertz time-domain spectroscopy
Optical pump, THz probe
Nonlinear THz spectroscopy (high THz electric fields)
Transient infrared and visible absorption spectroscopy

Semiconductors & nanomaterials

Carbon nanotubes
Heteronanotubes: quasi-1D composite materials
Halide perovskites: charge transport, recombination and interfacial processes
Organic semiconductors

Functional materials

Atomic-scale defects in carbon
Vibrational states in wide-bandgap semiconductors
Probing magnetically-induced states with THz radiation: cyclotron spectroscopy; multiferroics

Teaching and Administration

From September 2023 onwards I am the Undergraduate Admissions Tutor for the Physics Department. I have previously acted as the Department's Director of Graduate Studies, and Postgraduate Admissions Tutor.

I lead the Warwick Centre for Ultrafast SpectroscopyLink opens in a new window, a research facility that uses short laser pulses to probe the properties of new materials.

Profile

A bit about me, in reverse chronological order! I am a full Professor in the Department of Physics at Warwick, where I have been based since 2013. I have acted as Postgraduate Admissions Tutor (2016-2019) and Director of Graduate Studies (2019-2022) for the Department. From 2009 to 2014 I was an EPSRC Career Acceleration Fellow, held first at the University of Oxford, then Warwick. Before that I completed a postdoc at ETH Zurich with Prof. Jérôme Faist, and my PhD at Oxford with Dr. Michael Johnston. For my undergraduate degree I studied Natural Sciences at Cambridge.

Ten recent papers...

Dual-Beam THz Spectrometer with Low-Aberration Optics and Off-Axis Multipixel Photoconductive Emitters for Reduced Systematic Errors

Distinguishing carrier transport and interfacial recombination at perovskite/transport-layer interfaces using ultrafast spectroscopy and numerical simulation

Temperature-Dependent Structural and Optoelectronic Properties of the Layered Perovskite 2-Thiophenemethylammonium Lead Iodide

Tunable Photoluminescence from Monolayer Molybdenum Disulfide

Simultaneous measurement of orthogonal terahertz fields via an emission multiplexing scheme

Quantifying photoluminescence variability in monolayer molybdenum disulfide films grown by chemical vapour deposition

The 3237 cm⁻¹ diamond defect: Ultrafast vibrational dynamics, concentration calibration, and relationship to the N₃VH⁰ defect

Optimum Optical Designs for Diffraction-Limited Terahertz Spectroscopy and Imaging Systems Using Off-Axis Parabolic Mirrors

Terahertz Emission via Optical Rectification in a Metal-Free Perovskite Crystal

High-bandwidth perovskite photonic sources on silicon

$\rightarrow$ Full publications list

Prof. James Lloyd-Hughes