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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.

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

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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lastchecktime (2020-10-25 2:09:46) correctly updated