Opendata, web and dolomites


Terahertz Ultra-Short Pulses from Self-Induced Transparency Modelocked Quantum Cascade Lasers

Total Cost €


EC-Contrib. €






 TERAULTRA project word cloud

Explore the words cloud of the TERAULTRA project. It provides you a very rough idea of what is the project "TERAULTRA" about.

interleaving    inter    goals    absorption    lt    recovery    possibility    semiconductor    mediated    terahertz    effect    break    comb    relatively    widths    cavities    dephasing    active    gt    electromagnetic    moments    interleaved    ultra    passive    times    modelocked    media    direction    subband    medium    modelocking    absorbing    tool    technological    cascade    science    coupled    stability    qcl    demonstration    demonstrations    create    fast    transparency    suppressing    first    lacks    qcls    realize    ideal    gain    simulating    section    light    frequency    determined    inherent    atmospheric    suitable    stable    independently    produces    limited    date    initiate    time    experimentally    quantum    thereby    crucially    thz    absorbs    coherence    continuous    pulses    source    pulse    self    ps    generation    resonant    engineered    spectrum    spectroscopy    waves    sit    dipole    laser    shorter    compact    owing    ultrafast    teraultra    waveguide   

Project "TERAULTRA" data sheet

The following table provides information about the project.


Organization address
city: LEEDS
postcode: LS2 9JT

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website
 Total cost 195˙454 €
 EC max contribution 195˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2015
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2016
 Duration (year-month-day) from 2016-03-01   to  2018-02-28


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITY OF LEEDS UK (LEEDS) coordinator 195˙454.00


 Project objective

The terahertz (THz) frequency range in the electromagnetic spectrum lacks a compact semiconductor source of ultra-short pulses, suitable for applications including ultrafast spectroscopy, atmospheric science and stable THz frequency comb generation. Although the quantum cascade laser (QCL) is a promising compact semiconductor THz source, its success in creating ultra-short pulses is limited due to the inherent fast gain recovery time. There have been demonstrations of short pulse (>1 ps) generation from THz QCLs based on active modelocking, although the stability of the pulses is limited. Crucially, there has been no demonstration of passive modelocking of QCLs to date, which in principle can create pulses much shorter than 1 ps.

The goals of the proposed TERAULTRA research are to break through this technological challenge, and create THz ultra-short pulses of <1 ps from QCLs using self-induced transparency (SIT) effects. Recently, it has been proposed that QCLs are the ideal tool to realize SIT mediated modelocking owing to their relatively long inter-subband coherence times, and, importantly, the possibility of interleaving gain and absorbing media with engineered dipole moments. While the gain medium produces gain, the absorbing medium absorbs the resonant light, suppressing the growth of the continuous waves, thereby creating short pulses. We will design THz QCLs with coupled gain and absorbing media that can initiate modelocking using SIT effects, for the first time. By simulating the gain recovery and dephasing times, dipole moments, and gain and absorption parameters, the stability of the modelocked pulses will be determined and understood theoretically. We will then demonstrate experimentally the first modelocked laser exploiting the SIT effect, based on a THz QCL with interleaved gain and absorbing media in the growth direction as well as based on independently-controlled two-section waveguide cavities, leading to pulse widths <1 ps.


year authors and title journal last update
List of publications.
2017 Muhammad Anisuzzaman Talukder
Ultra-short pulses from quantum cascade lasers for terahertz time domain spectroscopy
published pages: 1020906, ISSN: , DOI: 10.1117/12.2267431
Image Sensing Technologies: Materials, Devices, Systems, and Applications IV 2019-06-13
2016 M. A. Talukder, P. Dean, E. Linfield, A. G. Davies
Cavity-induced slow gain recovery in pump-probe experiments of quantum cascade lasers
published pages: , ISSN: , DOI:
International Quantum Cascade Lasers School and Workshop (IQCLSW), Cambridge, UK (2016) 2019-06-13

Are you the coordinator (or a participant) of this project? Plaese send me more information about the "TERAULTRA" project.

For instance: the website url (it has not provided by EU-opendata yet), the logo, a more detailed description of the project (in plain text as a rtf file or a word file), some pictures (as picture files, not embedded into any word file), twitter account, linkedin page, etc.

Send me an  email ( and I put them in your project's page as son as possible.

Thanks. And then put a link of this page into your project's website.

The information about "TERAULTRA" are provided by the European Opendata Portal: CORDIS opendata.

More projects from the same programme (H2020-EU.1.3.2.)

INTERGLP1 (2020)

Dissecting GLP-1 receptor internalization pathways using genetic and pharmacological tools

Read More  

Drought (2020)

Drought coping strategies in southern Africa 1966-2016

Read More  

MAREITA (2018)

Mapping Remediation in Italian Literature Beyond the Digital Revolution

Read More