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Ultrafast & Terahertz Photonics Group

Research areas

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.

CNT

Recent papers:

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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.

Medical

Recent papers:

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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.

Electronically-delayed optical pump/THz probe spectroscopy on a variety of semiconductors

Recent papers:

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Terahertz components, methods 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).

Single-pixel

Recent papers:

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Recent publication highlights [filter by topic: view all | highlights | THz | perovskites | nano | biomedical]

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Multi-pixel photoconductive emitters for the controllable generation of azimuthal and radial terahertz beams ("Editor's Pick")

Multi-pixel emitters

J. Deveikis and J. Lloyd-Hughes
Optics Express 30 43293 (Nov 2022)

Thu 10 Nov 2022, 13:00 | Tags: 2022, Lloyd-Hughes, THz components, THz spectroscopy

Precise and accurate control of the ellipticity of THz radiation using a photoconductive pixel array

Multi-pixel emitters

C.D.W. Mosley, J. Deveikis and J. Lloyd-Hughes
Appl. Phys. Lett. 119 121105 (Sep 2021)

Tue 21 Sept 2021, 12:00 | Tags: 2021, Lloyd-Hughes, THz components, THz spectroscopy

Ultrafast, high modulation depth terahertz modulators based on carbon nanotube thin films

1D van der Waals hetereostructures

M.G. Burdanova, G.M. Katybab, R. Kashtiban, G.A. Komandin, E. Butler-Caddle, M. Staniforth, A.A. Mkrtchyan, D.V. Krasnikov, Y.G. Gladush, J.Sloan, A.G. Nasibulin and J. Lloyd-Hughes
Carbon 173 245 (Mar 2021)

Mon 01 Mar 2021, 00:00 | Tags: 2021, Lloyd-Hughes, THz components, THz spectroscopy, nanomaterials

Low cost and long-focal-depth metallic axicon for terahertz frequencies based on parallel-plate-waveguides

Diagram

A. I. Hernandez-Serrano and E. Pickwell-MacPherson
Scientific Reports 11, 3005 (February 2021)

Thu 04 Feb 2021, 13:20 | Tags: 2021, MacPherson, THz components, THz imaging

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