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Ultrafast tunneling microscopy by optical field control of quantum currents

Total Cost €


EC-Contrib. €






 UpTEMPO project word cloud

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

operate    experimental    solely    wave    transition    tip    dynamics    pulses    er    follows    scanning    rate    pulse    near    vi    core    microscope    resonantly    imaging    femtosecond    excite    induce    transport    bias    few    electronic    repetition    optical    nanojunctions    fact    designed    basic    cycle    fiber    mhz    vacuum    sub    precision    experiments    ultrabroadband    coherent    relies    tunneling    density    optics    electric    harnessed    mid    time    standard    microscopy    optically    resolution    direct    locked    setup    evolution    exhibit    energies    scheme    pump    technique    net    flow    enhanced    map    stm    combination    impulsive    magnitude    boundary    light    junction    single    radiation    ultrafast    profile    maximum    sensitivity    off    currents    voltage    nanosystems    wavefunctions    independent    stability    generate    laser    guarantee    establishing    coupled    nonlinear    onto    charge    electron    orders    trains    semiconductors    cosine    temporal    ultra    atomic    passively    photoexcitation    resonant    packets    molecules    interval    infrared    probe   

Project "UpTEMPO" data sheet

The following table provides information about the project.


Organization address
postcode: 4365

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 Luxembourg [LU]
 Total cost 1˙999˙509 €
 EC max contribution 1˙999˙509 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2018-COG
 Funding Scheme ERC-COG
 Starting year 2019
 Duration (year-month-day) from 2019-09-01   to  2024-08-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITE DU LUXEMBOURG LU (ESCH-SUR-ALZETTE) coordinator 1˙999˙509.00


 Project objective

The project aims at imaging electronic dynamics in molecules with atomic precision and sub-femtosecond temporal resolution. This result will be achieved by establishing new experiments at the boundary of ultrafast optics and scanning probe microscopy where the electric field of single-cycle light pulses is harnessed to control currents in nanojunctions. The basic concept relies on the fact that state-of-the-art femtosecond optical wave packets exhibit only one cycle of radiation with a defined electric field maximum. These pulses need to be phase locked to a “cosine-like” electric field profile. If such radiation is focused onto a junction with a nonlinear current-voltage characteristics, a net charge flow results solely due to the bias induced by the optical field. In detail, we want to exploit the time resolution provided by this new technique and induce electron transport at the probe tip of a scanning tunneling microscope (STM). The optical control of the current over a sub-optical-cycle interval will guarantee a temporal resolution better that one femtosecond, thus improving by several orders of magnitude what can be achieved with standard electronic bias. The core of the experimental system will be an ultrabroadband and passively phase-locked Er:fiber laser that is designed to generate single-cycle optical pulses in the near/mid-infrared, i.e. off resonant to the transition energies of III-V and II-VI semiconductors and large molecules. This laser will operate at 80-MHz repetition rate for enhanced sensitivity and stability when coupled to an ultra-high-vacuum STM. The setup will allow for the direct combination of independent pulse trains to resonantly excite few-femtosecond dynamics and then probe the electron density via the optically driven tunneling. In this pump-probe scheme it will be possible to map with atomic resolution the coherent evolution of electronic wavefunctions that in molecules and nanosystems follows an impulsive photoexcitation.

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

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