Here, we report a Fano resonance between dark excitons and zone-edged acoustic phonons in few-layer WS2by using the resonant Raman technique. The discrete phonons with large momentum at the M-point of the Brillouin zone and the continuum dark exciton states related to the ...
Tunable Fano Resonance and Plasmon–Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature , M.; Alu, A.; Zheng, Y., Tunable Fano Resonance and Plasmon- Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature. ... M Wang,A Krasnok,T Zhan...
US Department of Energy under contract no. DE-AC02-05CH11231, which supported the GW and GW-BSE calculations, and by the National Science Foundation (NSF) grant no. DMR-1508412, which supported the magnetic-field-induced exciton mixing analyses. Computational resources were provided by the DOE...
Fig. 2: Magnetic field-dependence of emissions from bright and dark-exciton Rydberg states. Low-temperature photoluminescence (PL) spectra in arbitrary (arb.) units measured at selected in-plane magnetic fields in the energy region of bothaground andbexcited states. Spectra were shifted for clarity...
For WSe2 and WS2 MLs, these spectra are composed of two peaks, labelled D1and D2, which appear on the lower energy side of the bright A exciton. In agreement with our theoretical arguments, these two peaks are assigned to the magnetic-field induced emission due to dark excitons. The ...
In this work, we brighten the momentum-forbidden dark exciton by placing monolayer tungsten disulfide on top of nanotextured substrates, which imparts tensile strain, modifying its electronic band structure. This enables phonon-assisted exciton scattering between momentum valleys, thereby brightening ...
Here, we demonstrate a universal dark state nonlinear energy transfer (ET) mechanism in monolayer WS2/CsPbBr3 van der Waals heterostructures under two-photon excitation, which successfully utilizes the enormous energy reserved in the dark exciton state of CsPbBr3 to significantly improve the ...
Using a 0.7-mu m-diametered pump laser, the PL dark region can be facilely tailored from approximate to 0.5 to approximate to 5 mu m over a 10-mu m-1L-WS2 flake. An interesting photoinduced dedoping effect in 1L-TMDs after photodoping is discovered by FRAP, which has not been ...
In particular, the energy region where substantial nesting occurs, which is at the origin of the strong light–matter interaction of thin transition metal dichalcogenides and crucial for the prominent C-exciton, is described well and spans a more complex exciton landscape than previously anticipated....