Electroluminescence of monolayer WS$_2$ in a scanning tunneling microscope: the effect of bias polarity on the spectral and angular distribution of the emitted light

• Main Authors: Román}, Ricardo Javier Peña, Pommier, Delphine, Bretel, Rémi, López, Luis E. Parra, Lorchat, Etienne, Chaste, Julien, Ouerghi, Abdelkarim, Moal, Séverine Le, Boer-Duchemin, Elizabeth, Dujardin, Gérald, Borisov, Andrey G, Zagonel, Luiz F, Schull, Guillaume, Berciaud, Stéphane, Moal, Eric Le
• Format: Journal Article
• Language: English
• Published: 25.05.2022
• Subjects: Physics - Mesoscale and Nanoscale Physics

Inelastic electron tunneling in a scanning tunneling microscope (STM) is used to generate excitons in monolayer tungsten disulfide (WS$_2$). Excitonic electroluminescence is measured both at positive and negative sample bias. Using optical spectroscopy and Fourier-space optical microscopy, we show t...