Macroscopic electro-optical modulation of solution-processed molybdenum disulfide

Abstract

Molybdenum disulfide (MoS2) has drawn great interest for tunable photonics and optoelectronics advancement. Its solution processing, though scalable, results in randomly networked ensembles of discrete nanosheets with compromised properties for tunable device fabrication. Here, we show via density-functional theory calculations that the electronic structure of the individual solution-processed nanosheets can be modulated by external electric fields collectively. Particularly, the nanosheets can form Stark ladders, leading to variations in the underlying optical transition processes and thus, tunable macroscopic optical properties of the ensembles. We experimentally confirm the macroscopic electro-optical modulation employing solution-processed thin-films of MoS2 and ferroelectric P(VDF-TrFE), and prove that the localized polarization fields of P(VDF-TrFE) can modulate the optical properties of MoS2, specifically, the optical absorption and photoluminescence on a macroscopic scale. Given the scalability of solution processing, our results underpin the potential of electro-optical modulation of solution-processed MoS2 for scalable tunable photonics and optoelectronics. As an illustrative example, we successfully demonstrate solution-processed electro-absorption modulators.

Manuscript 14 pages, 5 figures. Supplementary Materials 10 pages 5 figures

References in corpus (21)

• Atomically thin MoS2: A new direct-gap semiconductor
• 2D materials and van der Waals heterostructures
• Two-Dimensional Material Nanophotonics
• Observation of tightly bound trions in monolayer MoS2
• Excitons in atomically thin transition metal dichalcogenides
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Optical modulators with two-dimensional layered materials
• Phonon and Raman scattering of two-dimensional transition metal dichalcogenides from monolayer, multilayer to bulk material
• Origin of indirect optical transitions in few-layer MoS2, WS2 and WSe2
• Graphene-Based Integrated Photonics For Next-Generation Datacom And Telecom
• Photoluminescence of freestanding single- and few-layer MoS2
• Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide
• Active metasurfaces: lighting the path to commercial success
• Dissociation of two-dimensional excitons in monolayer WSe2
• The dielectric impact of layer distances on exciton and trion binding energies in van der Waals heterostructures
• Giant Stark splitting of an exciton in bilayer MoS${}_2$
• Imaging of anomalous internal reflections of hyperbolic phonon-polaritons in hexagonal boron nitride
• Stark effect spectroscopy of mono- and few-layer MoS${}_2$
• In-Plane Electric Field Induced Orbital Hybridization of Excitonic States In Monolayer WSe2
• Multiple light scattering and near-field effects in a fractal tree-like ensamble of dielectric nanoparticles
• Conduction modulation of solution-processed two-dimensional materials

Cited by in corpus (1)

• Analysis on reservoir activation with the nonlinearity harnessed from solution-processed molybdenum disulfide