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dc.contributor.authorChen, Chaoes_ES
dc.contributor.authorChen, Shues_ES
dc.contributor.authorLobo, Ricardo P.S.M.es_ES
dc.contributor.authorMaciel-Escudero, Carloses_ES
dc.contributor.authorLewin, Martines_ES
dc.contributor.authorTaubner, Thomases_ES
dc.contributor.authorXiong, Weies_ES
dc.contributor.authorXu, Minges_ES
dc.contributor.authorZhang, Xinlianges_ES
dc.contributor.authorMiao, Xiangshuies_ES
dc.contributor.authorLi, Peininges_ES
dc.contributor.authorHillenbrand, Raineres_ES
dc.date.accessioned2021-03-23T13:06:01Z-
dc.date.available2021-03-23T13:06:01Z-
dc.date.issued2020-
dc.identifier.citationACS Photonics 7(12): 3499–3506 (2020)es_ES
dc.identifier.urihttp://hdl.handle.net/10261/235566-
dc.description.abstractChalcogenide phase-change materials (PCMs) exhibit optical phonons at terahertz (THz) frequencies, which can be used for studying basic properties of the phase transition and which lead to a strong dielectric contrast that could be exploited for THz photonics applications. Here, we demonstrate that the phonons of PCMs can be studied by frequency-tunable THz scattering-type scanning near-field optical microscopy (s-SNOM). Specifically, we perform spectroscopic THz nanoimaging of a PCM sample comprising amorphous and crystalline phases. We observe phonon signatures, yielding strong s-SNOM signals and, most important, clear spectral differences between the amorphous and crystalline PCM, which allows for distinguishing the PCM phases with high confidence on the nanoscale. We also found that the spectral signature can be enhanced, regarding both signal strength and spectral contrast, by increasing the radius of the probing tip. From a general perspective, our results establish THz s-SNOM for nanoscale structural and chemical mapping based on local phonon spectroscopy.es_ES
dc.description.sponsorshipC.C. acknowledges the Postdoctoral Fund of Hubei Province (Grant No. 182/0106182067). M.X. acknowledges the National Key R&D Plan of China (Grant No. 2017YFB0701701 “Materials Genome Engineering”) and the National Natural Science Foundation of China (Grant No. 51772113). M.L. and T.T. acknowledge funding from the DFG (German Science Foundation) within the collaborative research center SFB 917 “Nanoswitches”. P. L. acknowledges the National Natural Science Foundation of China (Grant No. 62075070). R.H. acknowledges financial support from the European Union’s H2020 FET OPEN Project PETER (GA#767227), the Spanish Ministry of Science, Innovation and Universities (National Project RTI2018-094830-B-100 and the Project MDM-2016-0618 of the Marie de Maeztu Units of Excellence Program), and the Basque Government (Grant No. IT1164-19).es_ES
dc.language.isoenges_ES
dc.publisherACS Publicationses_ES
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/767227es_ES
dc.relationMICIU/ICTI2017-2020/RTI2018-094830-B-100es_ES
dc.relationRTI2018-094830-B-100/AEI/10.13039/501100011033es_ES
dc.relationMINECO/ICTI2013-2016/MDM-2016-0618es_ES
dc.rightsclosedAccesses_ES
dc.titleTerahertz nanoimaging and nanospectroscopy of chalcogenide phase-change materialses_ES
dc.typeartículoes_ES
dc.identifier.doihttp://dx.doi.org/10.1021/acsphotonics.0c01541-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttps://doi.org/10.1021/acsphotonics.0c01541es_ES
dc.identifier.e-issn2330-4022-
dc.contributor.funderHubei Provincial Natural Science Foundationes_ES
dc.contributor.funderGerman Research Foundationes_ES
dc.contributor.funderNational Natural Science Foundation of Chinaes_ES
dc.contributor.funderEuropean Commissiones_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.contributor.funderAgencia Estatal de Investigación (España)es_ES
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es_ES
dc.contributor.funderEusko Jaurlaritzaes_ES
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000780es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003086es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100001659es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100001809es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100011033es_ES
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