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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.

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

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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