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

doi:10.1364/OPTICA.3.000882

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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 language	English
Pages (from-to)	882-886
Number of pages	5
Journal	Optica
Volume	3
Issue number	8
Early online date	3 Aug 2016
DOIs	https://doi.org/10.1364/OPTICA.3.000882
Publication status	Published - 20 Aug 2016

ASJC Scopus subject areas

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

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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.",

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AU - Kumar, Santosh

AU - Brotons-Gisbert, Mauro

AU - Al-Khuzheyri, Rima

AU - Branny, Artur

AU - Ballesteros-Garcia, Guillem

AU - Sánchez-Royo, Juan F.

AU - Gerardot, Brian D

PY - 2016/8/20

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N2 - 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.

AB - 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.

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Resonant laser spectroscopy of localized excitons in monolayer WSe₂

Abstract

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