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VHPC

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

Total Cost €

0

EC-Contrib. €

0

Partnership

0

Views

0

 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.

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

Project "VHPC" data sheet

The following table provides information about the project.

Coordinator
FUNDACIO INSTITUT DE CIENCIES FOTONIQUES 

Organization address
address: AVINGUDA CARL FRIEDRICH GAUSS 3
city: Castelldefels
postcode: 8860
website: www.icfo.eu

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

 Partnership

Take a look of project's partnership.

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

Map

Leaflet | Map data © OpenStreetMap contributors, CC-BY-SA, Imagery © Mapbox

 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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