Fig. 1: IXs in a WS2/WSe2 HS.
From: Nonvolatile electrical switching of optical and valleytronic properties of interlayer excitons
a, b Schematic and optical microscope image of the device, respectively. 1L/1L and 1L/2L represents monolayer WS2/monolayer WSe2 and monolayer WS2/bi-layer WSe2 respectively. c PL spectra of the HS and monolayer WSe2 and WS2 at 78 K under 23 μW excitation at 532 nm. For a clear visualization, the PL spectrum of individual WS2 is multiplied by a factor 0.02. d PL spectra of the IXs as a function of excitation power under 633 nm laser excitation at 78 K.
