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 journalArticlepeer-review

29 Citations (Scopus)
60 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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