Resonant laser spectroscopy of localized excitons in monolayer WSe2

Santosh Kumar, Mauro Brotons-Gisbert, Rima Al-Khuzheyri, Artur Branny, Guillem Ballesteros-Garcia, Juan F. Sánchez-Royo, Brian D Gerardot

Research output: Contribution to journalArticle

23 Citations (Scopus)
49 Downloads (Pure)

Abstract

Coherent quantum control and resonance fluorescence of few-level quantum systems is integral for quantum technologies. Here we perform resonance and near-resonance excitation of three-dimensionally confined excitons in monolayer WSe2 to reveal near-ideal single-photon fluorescence with count rates up to 3 MHz. Using high-resolution photoluminescence excitation spectroscopy of the localized excitons, we uncover a weakly fluorescent exciton state ∼5 meV blue shifted from the ground-state exciton, providing important information to unravel the precise nature of quantum states. Successful demonstration of resonance fluorescence paves the way to probe the localized exciton coherence in two-dimensional semiconductors.

Original languageEnglish
Pages (from-to)882-886
Number of pages5
JournalOptica
Volume3
Issue number8
Early online date3 Aug 2016
DOIs
Publication statusPublished - 20 Aug 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

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    Kumar, S., Brotons-Gisbert, M., Al-Khuzheyri, R., Branny, A., Ballesteros-Garcia, G., Sánchez-Royo, J. F., & Gerardot, B. D. (2016). Resonant laser spectroscopy of localized excitons in monolayer WSe2. Optica, 3(8), 882-886. https://doi.org/10.1364/OPTICA.3.000882