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Optical valley Hall effect in gapped graphene for infrared and terahertz light photodetection

Total Cost €


EC-Contrib. €






 VHPC project word cloud

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

dynamics    dof    pair    computing    magnetic    resolved    experimental    rule    optoelectronics    hall    optoelectronic    intriguing    boron    behaviors    carriers    corner    break    valley    gate    possibility    found    quantum    optical    berry    labeled    fundamental    measuring    close    modern    breaking    electron    manipulating    infrared    band    dependent    photodetector    valleys    ultrahigh    dual    sections    inversion    lattices    analogy    bloch    brillouin    degrees    giving    time    contrasted    transistor    symmetry    carrier    gapped    freedom    electrons    paradigm    core    photodetection    fabricating    graphene    device    practical    orbital    bilayer    confining    signal    charge    manifest    zone    hexagonal    first    dimensional    curvatures    valleytronics    specified    mobility    2d    heterostructure    supplies    crystal    effect    nitride    generation    moments    structures    function    pseudospin    extremely    explore    section    spin    terahertz    ultrafast       prospect   

Project "VHPC" data sheet

The following table provides information about the project.


Organization address
city: Castelldefels
postcode: 8860

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 Spain [ES]
 Total cost 158˙121 €
 EC max contribution 158˙121 € (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 2017-08-22   to  2019-08-21


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    FUNDACIO INSTITUT DE CIENCIES FOTONIQUES ES (Castelldefels) coordinator 158˙121.00


 Project objective

Modern information processing is based on the degrees of freedom (DOF) of electrons, which are known as charge and spin. Manipulating DOF of electrons is the core function of information-processing unit such as transistor and photodetector. Finding and manipulating new DOF for electrons may open up possibility for next-generation information processing, such as quantum computing. Recently, a new DOF of electrons—valley pseudospin—was found in two dimensional (2D) hexagonal lattices, whose band structures manifest a pair of valleys at the corner of the hexagonal Brillouin zone (labeled as K and -K valley), giving rise to a valley DOF that is in close analogy to electron spin. As 2D hexagonal crystal, graphene, with ultrahigh carrier mobility and ultrafast optoelectronic signal processing ability, has great potential as carrier of valley DOF and intriguing prospect for both fundamental research and practical application of valleytronics. Therefore manipulating valley pseudospin of electrons in graphene would greatly advance the study of valleytronics. This proposal presents the first experimental study of Berry optoelectronics in gapped graphene, in particular extremely strong Valley Hall effects and Valley Hall dynamics. The implementation includes three sections. The first is to break inversion symmetry of graphene crystal by fabricating graphene/boron nitride heterostructure and dual-gate bilayer graphene device. This symmetry breaking allows the Bloch electrons in K and -K valleys to experience valley-contrasted orbital magnetic moments and Berry curvatures, which result in valley-dependent optical selection rule and valley Hall effect. This supplies us paradigm for infrared and terahertz photodetection for section two. In section three, we explore the dynamics of confining charge carriers in a specified valley, by measuring the time-resolved behaviors.

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

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