James Lloyd-Hughes

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University of Warwick
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United Kingdom

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About

James Lloyd-Hughes is an Associate Professor at the University of Warwick, United Kingdom. His research areas encompass terahertz spectroscopy, nonlinear optics, and the structural chemistry of perovskites and graphene-based materials. His recent publications include advancements in terahertz harmonic generation, dual-beam spectroscopy, and the optoelectronic properties of layered perovskites. He is also focused on understanding carrier transport dynamics and photoluminescence in two-dimensional materials.

Positions (1)

Articles (20)

Active THz beam shaping using a one-dimensional array of photoconductive emitters

The spatial profile of a beam of pulsed terahertz (THz) radiation is controlled electrically using a multi-pixel photoconductive emitter, which consists of an array of interdigitated electrodes fabricated on semi-insulating GaAs. Activating individual pixels allows the transverse position of the THz beam's focus to be varied off-axis, as verified by spatial beam profiles. Enabling multiple pixels simultaneously permits non-Gaussian beam shapes to be created. The diffraction-limited performance of the system is established by comparison with the Abbé and Sparrow criteria, and a condition for effective beam steering using this design is derived. The spatial resolution of the approach is linked to the frequency of the THz radiation and the f-number of the collection optic.

Year:

2023

Collaborators (16)

Jessica Louise Boland

The University of Manchester

UNITED KINGDOM

Abdul Wadood Tadbier

University of Cambridge

UNITED KINGDOM

Pablo Docampo

University of Glasgow

UNITED KINGDOM

Rebecca L. Milot

University of Warwick

UNITED KINGDOM

Igor Marko

University of Glasgow

UNITED KINGDOM

Maurizio Monti

Aarhus University

DENMARK

Eric Faulques

Université de Lille

FRANCE

Sophie Pain

Assistant Professor/Royal Academy of Engineering Research Fellow

University of Warwick

UNITED KINGDOM

Jeremy Sloan

Reader

University of Warwick

UNITED KINGDOM

Chunhui Yao

University of Cambridge

UNITED KINGDOM

Imalka Jayawardena

Lecturer

University of Surrey

UNITED KINGDOM

David Quigley

Professor

University of Warwick

UNITED KINGDOM

Jie Liu

University of Warwick

UNITED KINGDOM

Riccardo Degl'Innocenti

Senior Lecturer in Photonics Engineering

Queen Mary University of London

UNITED KINGDOM

Paulo Medeiros

-

SWEDEN

Jan Verlet

Professor

University of Durham

UNITED KINGDOM
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