Raman spectroscopy of graphene under ultrafast laser excitation
dc.contributor.author | Ferrante, C | |
dc.contributor.author | Virga, A | |
dc.contributor.author | Benfatto, L | |
dc.contributor.author | Martinati, M | |
dc.contributor.author | De Fazio, D | |
dc.contributor.author | Sassi, U | |
dc.contributor.author | Fasolato, C | |
dc.contributor.author | Ott, AK | |
dc.contributor.author | Postorino, P | |
dc.contributor.author | Yoon, D | |
dc.contributor.author | Cerullo, G | |
dc.contributor.author | Mauri, F | |
dc.contributor.author | Ferrari, AC | |
dc.contributor.author | Scopigno, T | |
dc.date.accessioned | 2019-09-03T08:49:04Z | |
dc.date.issued | 2018-01-22 | |
dc.description.abstract | The equilibrium optical phonons of graphene are well characterized in terms of anharmonicity and electron–phonon interactions; however, their non-equilibrium properties in the presence of hot charge carriers are still not fully explored. Here we study the Raman spectrum of graphene under ultrafast laser excitation with 3 ps pulses, which trade off between impulsive stimulation and spectral resolution. We localize energy into hot carriers, generating non-equilibrium temperatures in the ~1700–3100 K range, far exceeding that of the phonon bath, while simultaneously detecting the Raman response. The linewidths of both G and 2D peaks show an increase as function of the electronic temperature. We explain this as a result of the Dirac cones’ broadening and electron–phonon scattering in the highly excited transient regime, important for the emerging field of graphene-based photonics and optoelectronics. | en_GB |
dc.description.sponsorship | European Research Council (ERC) | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.identifier.citation | Vol. 9, article 308 | en_GB |
dc.identifier.doi | 10.1038/s41467-017-02508-x | |
dc.identifier.grantnumber | Hetero2D | en_GB |
dc.identifier.grantnumber | EP/K01711X/1 | en_GB |
dc.identifier.grantnumber | EP/K017144/1 | en_GB |
dc.identifier.grantnumber | EP/N010345/1 | en_GB |
dc.identifier.grantnumber | EP/L016087/1 | en_GB |
dc.identifier.grantnumber | MAECI | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/38517 | |
dc.language.iso | en | en_GB |
dc.publisher | Nature Research | en_GB |
dc.rights | © The Author(s) 2018. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. | en_GB |
dc.title | Raman spectroscopy of graphene under ultrafast laser excitation | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2019-09-03T08:49:04Z | |
dc.description | This is the final version. Available on open access from Nature Research via the DOI in this record | en_GB |
dc.description | Data availability: All relevant data are available from the authors. | en_GB |
dc.identifier.journal | Nature Communications | en_GB |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2017-12-06 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2017-12-06 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2019-09-03T08:46:04Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2019-09-03T08:49:07Z | |
refterms.panel | B | en_GB |
refterms.depositException | publishedGoldOA |
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