Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation

We use laser-scanning nonlinear imaging microscopy in atomically thin transition metal dichalcogenides (TMDs) to reveal information on the crystalline orientation distribution, within the 2D lattice. In particular, we perform polarization-resolved second-harmonic generation (PSHG) imaging in a stati...

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Autores principales:	Maragkakis George Miltos, Psilodimitrakopoulos Sotiris, Mouchliadis Leonidas, Paradisanos Ioannis, Lemonis Andreas, Kioseoglou George, Stratakis Emmanuel
Formato:	article
Lenguaje:	EN
Publicado:	Institue of Optics and Electronics, Chinese Academy of Sciences 2019
Materias:	nonlinear imaging of 2d materials crystal orientation mapping crystal quality marker polarization-resolved second-harmonic generation atomically thin transition metal dichalcogenides graphene-related materials Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/2b725358bc5d4732b2cd72bf2444e67f
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spelling	oai:doaj.org-article:2b725358bc5d4732b2cd72bf2444e67f2021-11-11T09:52:52ZImaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation2096-457910.29026/oea.2019.190026https://doaj.org/article/2b725358bc5d4732b2cd72bf2444e67f2019-11-01T00:00:00Zhttp://www.oejournal.org/article/doi/10.29026/oea.2019.190026https://doaj.org/toc/2096-4579We use laser-scanning nonlinear imaging microscopy in atomically thin transition metal dichalcogenides (TMDs) to reveal information on the crystalline orientation distribution, within the 2D lattice. In particular, we perform polarization-resolved second-harmonic generation (PSHG) imaging in a stationary, raster-scanned chemical vapor deposition (CVD)-grown WS2 flake, in order to obtain with high precision a spatially resolved map of the orientation of its main crystallographic axis (armchair orientation). By fitting the experimental PSHG images of sub-micron resolution into a generalized nonlinear model, we are able to determine the armchair orientation for every pixel of the image of the 2D material, with further improved resolution. This pixel-wise mapping of the armchair orientation of 2D WS2 allows us to distinguish between different domains, reveal fine structure, and estimate the crystal orientation variability, which can be used as a unique crystal quality marker over large areas. The necessity and superiority of a polarization-resolved analysis over intensity-only measurements is experimentally demonstrated, while the advantages of PSHG over other techniques are analysed and discussed.Maragkakis George MiltosPsilodimitrakopoulos SotirisMouchliadis LeonidasParadisanos IoannisLemonis AndreasKioseoglou GeorgeStratakis EmmanuelInstitue of Optics and Electronics, Chinese Academy of Sciencesarticlenonlinear imaging of 2d materialscrystal orientation mappingcrystal quality markerpolarization-resolved second-harmonic generationatomically thin transition metal dichalcogenidesgraphene-related materialsOptics. LightQC350-467ENOpto-Electronic Advances, Vol 2, Iss 11, Pp 190026-1-190026-8 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	nonlinear imaging of 2d materials crystal orientation mapping crystal quality marker polarization-resolved second-harmonic generation atomically thin transition metal dichalcogenides graphene-related materials Optics. Light QC350-467
spellingShingle	nonlinear imaging of 2d materials crystal orientation mapping crystal quality marker polarization-resolved second-harmonic generation atomically thin transition metal dichalcogenides graphene-related materials Optics. Light QC350-467 Maragkakis George Miltos Psilodimitrakopoulos Sotiris Mouchliadis Leonidas Paradisanos Ioannis Lemonis Andreas Kioseoglou George Stratakis Emmanuel Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation
description	We use laser-scanning nonlinear imaging microscopy in atomically thin transition metal dichalcogenides (TMDs) to reveal information on the crystalline orientation distribution, within the 2D lattice. In particular, we perform polarization-resolved second-harmonic generation (PSHG) imaging in a stationary, raster-scanned chemical vapor deposition (CVD)-grown WS2 flake, in order to obtain with high precision a spatially resolved map of the orientation of its main crystallographic axis (armchair orientation). By fitting the experimental PSHG images of sub-micron resolution into a generalized nonlinear model, we are able to determine the armchair orientation for every pixel of the image of the 2D material, with further improved resolution. This pixel-wise mapping of the armchair orientation of 2D WS2 allows us to distinguish between different domains, reveal fine structure, and estimate the crystal orientation variability, which can be used as a unique crystal quality marker over large areas. The necessity and superiority of a polarization-resolved analysis over intensity-only measurements is experimentally demonstrated, while the advantages of PSHG over other techniques are analysed and discussed.
format	article
author	Maragkakis George Miltos Psilodimitrakopoulos Sotiris Mouchliadis Leonidas Paradisanos Ioannis Lemonis Andreas Kioseoglou George Stratakis Emmanuel
author_facet	Maragkakis George Miltos Psilodimitrakopoulos Sotiris Mouchliadis Leonidas Paradisanos Ioannis Lemonis Andreas Kioseoglou George Stratakis Emmanuel
author_sort	Maragkakis George Miltos
title	Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation
title_short	Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation
title_full	Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation
title_fullStr	Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation
title_full_unstemmed	Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation
title_sort	imaging the crystal orientation of 2d transition metal dichalcogenides using polarization-resolved second-harmonic generation
publisher	Institue of Optics and Electronics, Chinese Academy of Sciences
publishDate	2019
url	https://doaj.org/article/2b725358bc5d4732b2cd72bf2444e67f
work_keys_str_mv	AT maragkakisgeorgemiltos imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration AT psilodimitrakopoulossotiris imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration AT mouchliadisleonidas imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration AT paradisanosioannis imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration AT lemonisandreas imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration AT kioseoglougeorge imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration AT stratakisemmanuel imagingthecrystalorientationof2dtransitionmetaldichalcogenidesusingpolarizationresolvedsecondharmonicgeneration
_version_	1718439200002408448

Imaging the crystal orientation of 2D transition metal dichalcogenides using polarization-resolved second-harmonic generation

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