Measurement of the surface susceptibility and the surface conductivity of atomically thin by spectroscopic ellipsometry
arXiv:1710.00340 · doi:10.1364/OL.43.000703
Abstract
We show how to correctly extract from the ellipsometric data the surface susceptibility and the surface conductivity that describe the optical properties of monolayer . Theoretically, these parameters stem from modelling a single-layer two-dimensional crystal as a surface current, a truly two-dimensional model. Currently experimental practice is to consider this model equivalent to a homogeneous slab with an effective thickness given by the interlayer spacing of the exfoliating bulk material. We prove that the error in the evaluation of the surface susceptibility of monolayer , owing to the use of the slab model, is at least 10% or greater, a significant discrepancy in the determination of the optical properties of this material.
Keywords: Ellipsometry, graphene, MoS2, two dimensional crystals, optical contrast, absorption, transition metal dichalcogenide monolayers
References in corpus (15)
- Electric Field Effect in Atomically Thin Carbon Films
- Two Dimensional Atomic Crystals
- Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
- Dyadic Green's Functions and Guided Surface Waves for a Surface Conductivity Model of Graphene
- Making graphene visible
- Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
- Hunting for Monolayer Boron Nitride: Optical and Raman Signatures
- Optical far-infrared properties of graphene monolayer and multilayers
- A new electromagnetic mode in graphene
- Spectroscopic ellipsometry of graphene and an exciton-shifted van Hove peak in absorption
- Visibility of dichalcogenide nanolayers
- Broad Band Optical Properties of Large Area Monolayer CVD Molybdenum Disulfide
- Transverse electric surface mode in atomically thin Boron-Nitride
- Clausius-Mossotti Lorentz-Lorenz relations and retardation effects for two-dimensional crystals
- Role of the radiation-reaction electric field in the optical response of two-dimensional crystals
Cited by in corpus (7)
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- Coulomb effects in the absorbance spectra of two-dimensional Dirac materials
- High-Sensitivity Characterization of Ultra-Thin Atomic Layers using Spin-Hall Effect of Light
- Reflection, transmission and surface susceptibility tensor in two-dimensional materials