Optical amplification by surface-plasmon-resonant Au grating substrates: Monolayer MoS2 with 170-fold second harmonic generation and 3-fold (off-resonance) Raman scattering

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorHolmi, Joonas T.en_US
dc.contributor.authorRaju, Rameshen_US
dc.contributor.authorYlönen, Jonasen_US
dc.contributor.authorSubramaniyam, Nagarajanen_US
dc.contributor.authorLipsanen, Harrien_US
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen
dc.contributor.groupauthorHarri Lipsanen Groupen
dc.contributor.groupauthorIlkka Tittonen Groupen
dc.contributor.organizationDepartment of Electronics and Nanoengineeringen_US
dc.date.accessioned2021-11-17T08:24:35Z
dc.date.available2021-11-17T08:24:35Z
dc.date.issued2021-12en_US
dc.descriptionFunding Information: This work was made possible by the Au MG substrates developed, fabricated, and provided by the Xfold Imaging Oy company. The research was funded by various grants from Aalto University , Finland. Authors acknowledge funding from the Academy of Finland Flagship Programme, Photonics Research and Innovation , decision number: 320167. The experiments were conducted in Aalto University at the OtaNano – Micronova Nanofabrication Centre and in University of Helsinki at the Biomedicum Imaging Unit. Publisher Copyright: © 2021 The Authors
dc.description.abstractNanoplasmonics is a potential game-changer in the development of next-generation on-chip photonic devices and computers, owing to the geometrically controlled and amplified linear and nonlinear optical processes. For instance, it resolves the limited light-matter interaction of the unique two-dimensional (2D) crystalline materials like semiconducting monolayer molybdenum disulfide (1L-MoS2). Metal grating (MG) substrates excel at this because their surface plasmons (SPs) can lead to stark field confinement near the surface. This work studies optical amplification of 1L-MoS2 on the gold (Au) MG substrate, which was designed to operate in a glycerol environment with SP resonance (SPR) at 850 nm excitation wavelength. Its design was verified by simulated and experimental reflectances, and topographically inspected by atomic force microscopy (AFM). Two advanced imaging modalities, second harmonic generation (SHG) and confocal Raman microscopy (CRM) were used to evaluate its 170-fold SHG on- and 3-fold CRM off-resonance optical amplifications, respectively. Some MoS2-to-grating adhesion issues due to trapped liquid showed as image nonuniformities. Possible improvements to limitations like surface roughness were also discussed. These Au MG substrates can boost conventional linear and nonlinear backscattering microscopies because they are tunable in the visible and near-infrared range by selecting geometry, metal, and environment.en
dc.description.versionPeer revieweden
dc.format.extent9
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationHolmi, J T, Raju, R, Ylönen, J, Subramaniyam, N & Lipsanen, H 2021, 'Optical amplification by surface-plasmon-resonant Au grating substrates: Monolayer MoS2 with 170-fold second harmonic generation and 3-fold (off-resonance) Raman scattering', Superlattices and Microstructures, vol. 160, 107077. https://doi.org/10.1016/j.spmi.2021.107077en
dc.identifier.doi10.1016/j.spmi.2021.107077en_US
dc.identifier.issn0749-6036
dc.identifier.otherPURE UUID: b1291819-c575-49be-9b67-30b580249fcben_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/b1291819-c575-49be-9b67-30b580249fcben_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/76344574/Holmi_Optical_amplification_SuMi.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/111106
dc.identifier.urnURN:NBN:fi:aalto-2021111710271
dc.language.isoenen
dc.publisherElsevier
dc.relation.fundinginfoThis work was made possible by the Au MG substrates developed, fabricated, and provided by the Xfold Imaging Oy company. The research was funded by various grants from Aalto University, Finland. Authors acknowledge funding from the Academy of Finland Flagship Programme, Photonics Research and Innovation, decision number: 320167. The experiments were conducted in Aalto University at the OtaNano ? Micronova Nanofabrication Centre and in University of Helsinki at the Biomedicum Imaging Unit. This work was made possible by the Au MG substrates developed, fabricated, and provided by the Xfold Imaging Oy company. The research was funded by various grants from Aalto University , Finland. Authors acknowledge funding from the Academy of Finland Flagship Programme, Photonics Research and Innovation , decision number: 320167. The experiments were conducted in Aalto University at the OtaNano – Micronova Nanofabrication Centre and in University of Helsinki at the Biomedicum Imaging Unit.
dc.relation.ispartofseriesSuperlattices and Microstructuresen
dc.relation.ispartofseriesVolume 160en
dc.rightsopenAccessen
dc.subject.keywordAmplified nonlinear optical processesen_US
dc.subject.keywordSurface-enhanced light-matter interactionsen_US
dc.subject.keywordSurface-plasmon-resonance optimized metal gratingsen_US
dc.subject.keywordTwo-dimensional van der Waals materials for on-chip photonic devicesen_US
dc.titleOptical amplification by surface-plasmon-resonant Au grating substrates: Monolayer MoS2 with 170-fold second harmonic generation and 3-fold (off-resonance) Raman scatteringen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion

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