# Exciton Collimation, Focusing and Trapping Using Complex Transition Metal Dichalcogenide Lateral Heterojunctions

https://mdr.nims.go.jp/datasets/819ce44f-3564-4afd-b287-c54f19e19d2c

## File

- [Advanced Optical Materials - 2024 - Lamsaadi - Exciton Collimation  Focusing and Trapping Using Complex Transition Metal.pdf](https://mdr.nims.go.jp/filesets/c9d2b7c1-b31c-44c2-9f38-c1274b3f6d6a/download) ([Detail](https://mdr.nims.go.jp/filesets/c9d2b7c1-b31c-44c2-9f38-c1274b3f6d6a.md))

## Id

819ce44f-3564-4afd-b287-c54f19e19d2c

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-15T02:45:23.481787Z

## Updated at

2026-02-17T07:30:10.271208Z

## Published at

2026-02-17T04:11:22.617118Z

## Doi



## First published url

https://doi.org/10.1002/adom.202403009

## Date published

2024-12-25

## Recorded date published

2025-4

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Exciton Collimation, Focusing and Trapping Using Complex Transition Metal
    Dichalcogenide Lateral Heterojunctions
  title_type: original
  lang: en

## Description

- description: Controlling the motion of neutral excitons in optically active media
    is a mandatory development to enable the conception of advanced circuits and devices
    for applications in excitronics, quantum photonics and optoelectronics. Recently,
    a proof of unidirectional (1D) exciton transport from high- to low-band-gap material
    has been evidenced using a high-quality lateral heterostructure separating transition
    metal dichalcogenide monolayers (TMD-MLs). In this paper, by combining room-temperature
    micro-photoluminescence (μ-PL) far-field imaging with a statistical description
    of exciton transport, we unveiled the underlying excitonic local distribution
    and fluxes taking place near lateral heterojunctions (LHs). We studied the complex
    2D excitonic transport properties found near a such linear interface separating
    WSe2 from MoSe2 TMD-MLs and reveal two distinct diffusion regimes profoundly affecting
    the effective diffusion length. Then, we showed that combining two and three of
    this interfaces together, in naturally occurring geometries, allows advanced in-plane
    control of the excitonic distribution and flux over large distances. We demonstrate
    exciton focalisation and trapping allowing an increase of the local exciton density
    up to three orders of magnitude. Finally, we achieve flux collimation with the
    formation of parallel current lines extending few micrometers away from the source.
    We believe that the deterministic shaping and positioning of the exciton distribution
    and flux we demonstrated here will be a key towards the conception of realistic
    excitronic devices.
  description_type: abstract
  lang: und

## Creator

- name: Hassan Lamsaadi
  role: author
- name: Aurelien Cuche
  role: author
- name: Gonzague Agez
  role: author
- name: Ioannis Paradisanos
  role: author
- name: Dorian Beret
  role: author
- name: Laurent Lombez
  role: author
- name: Pierre Renucci
  role: author
- name: Delphine Lagarde
  role: author
- name: Xavier Marie
  role: author
- name: Ziyang Gan
  role: author
- name: Antony George
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Andrey Turchanin
  role: author
- name: Nicolas Combe
  role: author
- name: Bernhard Urbaszek
  role: author
- name: Vincent Paillard
  role: author
- name: Jean‐Marie Poumirol
  role: author

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: 'exciton transport
    '
  schema: not_defined
- subject: lateral heterojunctions
  schema: not_defined
- subject: 'TMD monolayers
    '
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2024-12-25

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Advanced Optical Materials
  issn: '21951071'
  volume: '13'
  issue: '10'
  article_number: '2403009'

## Conference



## Related item



## Funding

- identifier: CRC 1375 NOA (Project B2 398816777)
  funder_name: Deutsche Forschungsgemeinschaft
- identifier: SPP2244 (Project TU149/21‐1 443361515)
  funder_name: Deutsche Forschungsgemeinschaft
- identifier: TU149/16‐1 (464283495)
  funder_name: Deutsche Forschungsgemeinschaft
- identifier: ANR‐21‐CE30‐0042
  funder_name: Agence Nationale de la Recherche

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: c9d2b7c1-b31c-44c2-9f38-c1274b3f6d6a
  filename: Advanced Optical Materials - 2024 - Lamsaadi - Exciton Collimation  Focusing
    and Trapping Using Complex Transition Metal.pdf
  content_type: application/pdf
  size: 3574608
  md5: 4494e456416a47d04334d5cda22c17e2

## Thumbnail

fileset_id: c9d2b7c1-b31c-44c2-9f38-c1274b3f6d6a
filename: Advanced Optical Materials - 2024 - Lamsaadi - Exciton Collimation  Focusing
  and Trapping Using Complex Transition Metal.pdf