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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.

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

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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