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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.

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

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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