Revealing atomically sharp interfaces of two-dimensional lateral heterostructures by second harmonic generation

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dc.contributor.authorSousa F.B.
dc.contributor.authorLafeta L.
dc.contributor.authorCadore A.R.
dc.contributor.authorSahoo P.K.
dc.contributor.authorMalard L.M.
dc.date.accessioned2024-03-12T19:19:53Z
dc.date.available2024-03-12T19:19:53Z
dc.date.issued2021
dc.description.abstract© 2021 IOP Publishing Ltd.The interface between two different semiconductors is crucial in determining the electronic properties at the heterojunction, therefore novel techniques that can probe these regions are of particular interest. Recently it has been shown that heterojunctions of two-dimensional transition metal dichalcogenides have sharp and epitaxial interfaces that can be used to the next generation of flexible and on chip optoelectronic devices. Here, we show that second harmonic generation (SHG) can be used as an optical tool to reveal these atomically sharp interfaces in different lateral heterostructures. We observed an enhancement of the SH intensity at the heterojunctions, and showed that is due to a coherent superposition of the SH emission from each material. This constructive interference pattern reveals a phase difference arising from the distinct second-order susceptibilities of both materials at the interface. Our results demonstrate that SHG microscopy is a sensitive characterization technique to unveil nanometric features in layered materials and their heterostructures.
dc.description.issuenumber3
dc.description.volume8
dc.identifier.doi10.1088/2053-1583/ac0731
dc.identifier.issn2053-1583
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34627
dc.relation.ispartof2D Materials
dc.rightsAcesso Restrito
dc.subject.otherlanguagenonlinear optics
dc.subject.otherlanguagesecond harmonic generation
dc.subject.otherlanguagetransition metal dichalcogenides
dc.subject.otherlanguagetwo-dimensional materials
dc.subject.otherlanguagevan der Waals heterostructures
dc.titleRevealing atomically sharp interfaces of two-dimensional lateral heterostructures by second harmonic generation
dc.typeArtigo
local.scopus.citations10
local.scopus.eid2-s2.0-85109870163
local.scopus.subjectAtomically sharp interface
local.scopus.subjectCharacterization techniques
local.scopus.subjectCoherent superpositions
local.scopus.subjectConstructive interference
local.scopus.subjectEpitaxial interfaces
local.scopus.subjectPhase difference
local.scopus.subjectSecond-order susceptibility
local.scopus.subjectTransition metal dichalcogenides
local.scopus.updated2024-12-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85109870163&origin=inward
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