Optical manipulation of the exciton charge state in single layer tungsten disulfide

Abstract

Raman scattering and photoluminescence (PL) emission are used to investigate a single layer of tungsten disulfide (WS${}_2$) obtained by exfoliating n-type bulk crystals. Direct gap emission with both neutral and charged exciton recombination is observed in the low temperature PL spectra. The ratio between the trion and exciton emission can be tuned simply by varying the excitation power. Moreover, the intensity of the trion emission can be independently tuned using additional sub band gap laser excitation.

References in corpus (2)

• Bandgap Engineering of Strained Monolayer and Bilayer MoS2
• Absorption in the fractional quantum Hall regime: trion dichroism and spin polarization

Cited by in corpus (40)

• Phonon and Raman scattering of two-dimensional transition metal dichalcogenides from monolayer, multilayer to bulk material
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Exciton Binding Energy of Monolayer WS2
• Identification of excitons, trions and biexcitons in single-layer WS2
• Valley excitons in two-dimensional semiconductors
• Nonlinear Photoluminescence in Atomically Thin Layered WSe2 Arising from Diffusion-Assisted Exciton-Exciton Annihilation
• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• The Effect of Preparation Conditions on Raman and Photoluminescence of Monolayer WS2
• Optical investigation of monolayer and bulk tungsten diselenide (WSe${}_2$) in high magnetic fields
• Raman scattering excitation spectroscopy in monolayer WS${}_2$
• Optical control of charged exciton states in tungsten disulfide
• Second order resonant Raman scattering in single layer tungsten disulfide (WS${}_2$)
• Ultra-low power threshold for laser induced changes in optical properties of 2D Molybdenum dichalcogenides
• Imaging Spin Dynamics in Monolayer WS2 by Time-Resolved Kerr Rotation Microscopy
• Anomalous temperature-dependent spin-valley polarization in monolayer WS${}_2$
• Microscopic Origin of the Valley Hall Effect in Transition Metal Dichalcogenides Revealed by Wavelength Dependent Mapping
• Excitons, trions, and biexcitons in transition metal dichalcogenides: magnetic field dependence
• Excitonic effects in two-dimensional semiconductors: Path integral Monte Carlo approach
• Large Range Manipulation of Exciton Species in Monolayer WS2
• The interplay between excitons and trions in a monolayer of MoSe${}_2$
• Many-body effects in nonlinear optical responses of 2D layered semiconductors
• Optical Absorption by Dirac Excitons in Single-Layer Transition-Metal Dichalcogenides
• Band nesting, massive Dirac Fermions and Valley Lande and Zeeman effects in transition metal dichalcogenides: a tight-binding model
• Tunneling-current-induced local excitonic luminescence in p-doped WSe${}_2$ monolayers
• Interfacial bound exciton state in a hybrid structure of monolayer WS2 and InGaN quantum dots
• Spectrally narrow exciton luminescence from monolayer MoS2 exfoliated onto epitaxially grown hexagonal BN
• Modulation of trion and exciton formation in monolayer WS2 by dielectric and substrate engineering
• Variation of photoluminescence spectral line shape of monolayer WS2
• Microscopic model of the doping dependence of line widths in monolayer transition metal dichalcogenides
• Effects of Dielectric Stoichiometry on the Photoluminescence Properties of Encapsulated WSe2 Monolayers
• Computing Optical Properties of Ultra-thin Crystals
• Magneto photoluminescence measurements of tungsten disulphide monolayers
• Tensile strain induced brightening of momentum forbidden dark exciton in WS${}_2$
• Large trion binding energy in monolayer WS${}_2$ via strain-enhanced electron-phonon coupling
• Simulation of emission spectra of transition-metal dichalcogenide monolayers with the multimode Brownian oscillator model
• Strain Engineering in Monolayer WS2 and WS2 Nanocomposites
• Direct observation of ultrafast defect-bound and free exciton dynamics in defect-engineered WS${}_2$ monolayers
• Room-temperature vacuum Rabi splitting with active control in two-dimensional atomic crystals
• Spatially Resolved Persistent Photoconductivity in MoS${}_2$-WS${}_2$ Lateral Heterostructures
• Low-dimensional quantum systems