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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.

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

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

 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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