Research Fellow in Acoustic Modulation of Terahertz Quantum Cascade Lasers

University of Leeds

Leeds, United Kingdom

ID: 7084072 (Ref.No. EPSEE1049)
Posted: August 27, 2021

Job Description

Are you an ambitious researcher looking for your next challenge? Do you have an established background in quantum cascade lasers, terahertz time-domain spectroscopy, or amplified Ti:sapphire lasers? Do you want to further your career in one of the UK’s leading research-intensive universities?

 We seek a post-doctoral research fellow to join a collaborative EPSRC-funded project, joint with the University of Nottingham, on the topic of acoustic modulation of terahertz quantum cascade lasers (THz QCLs).  You will develop new modulation schemes for GaAs/AlGaAs THz QCLs, building on our recent joint work which showed that bulk acoustic waves can be used to modulate the band structure and so modulate the THz light output on a fast timescale (see

 In order to understand and exploit the band modulation, you will first develop synchronised acoustic and terahertz spectroscopy techniques in which a (relatively fast) THz signal propagates along with the (relatively slow) acoustic signal along a QCL ridge.  This will explore the effect of acoustic waves on carrier transport and THz emission in QCLs.  You will then investigate the application of surface acoustic waves to generate a dynamic lateral patterning of the ridge to achieve unprecedented electrical control of their output frequency within the gain bandwidth.  These results will then be combined and built upon to develop a novel THz S-LASER source, capable of the first coherently coupled amplification of photons and phonons, enabling both optical amplitude modulation and frequency modulation.  You will join a world-leading terahertz group at the University of Leeds, with state-of-the-art growth, device fabrication, and terahertz experimental facilities, and will collaborate strongly with workers at the world-leading group ultrafast acoustics group at the University of Nottingham.

 You will have a background in laser physics/optics, and knowledge of pump/probe THz spectropscopy techniques.  You will have excellent interpersonal skills, a highly proactive approach to problem solving, and be comfortable interacting day-to-day with academics of all career stages across multiple institutions.

To explore the post further or for any queries you may have, please contact: 

Professor John Cunningham


Please note: If you are not a British or Irish citizen, from 1 January 2021 you will require permission to work in the UK. This will normally be in the form of a visa but, if you are an EEA/Swiss citizen and resident in the UK before 31 December 2020, this may be your passport or status under the EU Settlement Scheme.

Location:  Leeds - Main Campus
Faculty/Service:  Faculty of Engineering & Physical Sciences
School/Institute:  School of Electronic & Electrical Engineering
Category:  Research
Grade:  Grade 7
Salary:  £33,797 to £40,322 p.a.
Due to funding restrictions an appointment will not be made above £33,797 p.a.
Working Time:  37.5 hours per week
Post Type:  Full Time
Contract Type:  Fixed Term (3 years (grant funding))
Release Date:  Friday 27 August 2021
Closing Date:  Friday 08 October 2021
Interview Date:  To be confirmed
Reference:  EPSEE1049

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