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Ultrafast opto-electronic twists: Controlling the chirality of electrons and extreme-UV photons by ultrafast laser pulses (UCHIRAL).

Total Cost €


EC-Contrib. €






 UCHIRAL project word cloud

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

dynamics    expertise    right    wave    source    coherent    helix    physical    polariton    interaction    near    left    uchiral    circularly    electron    excitations    spins    tracking    intrinsic    scientific    industrial    uv    harmonics    angular    light    inaccessible    optical    transmission    levels    free    biomolecules    coherently    host    ranging    optically    storage    describing    radiation    intense    ferromagnetic    maturity    helicity    extreme    beam    polarized    pulses    technologies    surface    vs    magnets    ultrashort    double    metals    images    efficient    entities    employing    functions    chiral    electrons    flying    magnetic    nanostructures    orbital    relies    photons    laser    materials    mediated    acquired    property    interactions    combining    fundamental    entails    ultrafast    imaging    plasmon    first    background    envisaged    microscope    potentially    convert    difference    exhibiting    bright    designed    microscopy    nanoscale    isolate    handedness    mechanism    nanosystems    chirality    momentum    pulsed    dna    elliptically   

Project "UCHIRAL" data sheet

The following table provides information about the project.


Organization address
postcode: 37073

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 Germany [DE]
 Total cost 171˙460 €
 EC max contribution 171˙460 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2017
 Duration (year-month-day) from 2017-07-01   to  2019-06-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Chirality, describing the “handedness” of a system, is a fundamental property of physical entities such as magnets, spins, the DNA double-helix, or circularly and elliptically polarized light. This proposal aims at employing intense ultrashort laser fields to control the chirality of two physical entities: photons of extreme-UV high harmonics, and free-flying electrons in a coherent pulsed beam.

Specifically, the proposal “UCHIRAL” entails two main objectives: First, we develop a bright ultrafast source of circularly polarized extreme-UV high harmonics with optically controlled helicity (left vs. right) by combining the applicant's expertise with chiral harmonics with the host's efficient source. We will then use these chiral extreme-UV pulses for imaging of nanoscale magnetic features in ferromagnetic metals, which is currently inaccessible for high harmonics. The difference between images acquired with left- vs. right-circularly polarized extreme-UV radiation can isolate magnetic effects from a non-magnetic background.

In a second system, we will coherently convert the chirality of optical near-fields into orbital angular momentum of a beam of free electrons. This interaction will be mediated by designed nanostructures exhibiting surface plasmon-polariton excitations with optically-controlled chirality. The envisaged mechanism relies on optical phase control of free electron wave functions in an ultrafast transmission electron microscope, which was recently established in the host institute.

Both aspects of the proposal address fundamental interactions of chiral light with matter, currently at different levels of maturity, with expected scientific and potentially industrial applications. In particular, ultrafast chiral microscopy based on photons (first objective) and electrons (second objective) may enable future technologies by tracking chiral dynamics in nanosystems with intrinsic handedness, ranging from magnetic storage materials to biomolecules.


year authors and title journal last update
List of publications.
2019 Ofer Kfir
Entanglements of Electrons and Cavity Photons in the Strong-Coupling Regime
published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.123.103602
Physical Review Letters 123/10 2020-01-21
2017 Ofer Kfir, Sergey Zayko, Christina Nolte, Murat Sivis, Marcel Möller, Birgit Hebler, Sri Sai Phani Kanth Arekapudi, Daniel Steil, Sascha Schäfer, Manfred Albrecht, Oren Cohen, Stefan Mathias, Claus Ropers
Nanoscale magnetic imaging using circularly polarized high-harmonic radiation
published pages: eaao4641, ISSN: 2375-2548, DOI: 10.1126/sciadv.aao4641
Science Advances 3/12 2020-01-21

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