Tip-induced and electrical control of the photoluminescence yield of monolayer WS2 - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nano Letters Année : 2022

Tip-induced and electrical control of the photoluminescence yield of monolayer WS2

Rémi Bretel
  • Fonction : Auteur
  • PersonId : 1222425
  • IdRef : 261402803
Delphine Pommier
  • Fonction : Auteur
  • PersonId : 1153249
  • IdRef : 258367253
Gérald Dujardin
Eric Le Moal

Résumé

The photoluminescence (PL) of monolayer tungsten disulfide (WS2) is locally and electrically controlled using the nonplasmonic tip and tunneling current of a scanning tunneling microscope (STM). The spatial and spectral distribution of the emitted light is determined using an optical microscope. When the STM tip is engaged, short-range PL quenching due to near-field electromagnetic effects is present, independent of the sign and value of the bias voltage applied to the tip–sample tunneling junction. In addition, a bias-voltage-dependent long-range PL quenching is measured when the sample is positively biased. We explain these observations by considering the native n-doping of monolayer WS2 and the charge carrier density gradients induced by electron tunneling in micrometer-scale areas around the tip position. The combination of wide-field PL microscopy and charge carrier injection using an STM opens up new ways to explore the interplay between excitons and charge carriers in two-dimensional semiconductors.
Fichier principal
Vignette du fichier
article.pdf (2.25 Mo) Télécharger le fichier
suppinfo.pdf (6.76 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03883664 , version 1 (03-12-2022)

Identifiants

Citer

Ricardo Javier Peña Román, Rémi Bretel, Delphine Pommier, Luis Enrique Parra Lopez, Étienne Lorchat, et al.. Tip-induced and electrical control of the photoluminescence yield of monolayer WS2. Nano Letters, 2022, 22 (23), pp.9244-9251. ⟨10.1021/acs.nanolett.2c02142⟩. ⟨hal-03883664⟩
59 Consultations
35 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More