6533b823fe1ef96bd127f414
RESEARCH PRODUCT
Resonant laser spectroscopy of localized excitons in monolayer WSe_2
Brian D. GerardotRima Al-khuzheyriMauro Brotons-gisbertSantosh KumarJuan F. Sánchez-royoGuillem Ballesteros-garciaArtur Brannysubject
Semiconductor luminescence equationsCondensed Matter::OtherChemistryExciton02 engineering and technologyCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnology01 natural sciencesAtomic and Molecular Physics and Optics3. Good healthElectronic Optical and Magnetic MaterialsQuantum technologyCondensed Matter::Materials ScienceResonance fluorescence0103 physical sciencesPhotoluminescence excitationAtomic physicsQuantum-optical spectroscopy010306 general physics0210 nano-technologySpectroscopyBiexcitondescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-08-03 | Optica |