Please use this identifier to cite or link to this item: https://doi.org/10.1021/nl4042577
DC FieldValue
dc.titleUltrafast and nanoscale plasmonic phenomena in exfoliated graphene revealed by infrared pump-probe nanoscopy
dc.contributor.authorWagner, M.
dc.contributor.authorFei, Z.
dc.contributor.authorMcLeod, A.S.
dc.contributor.authorRodin, A.S.
dc.contributor.authorBao, W.
dc.contributor.authorIwinski, E.G.
dc.contributor.authorZhao, Z.
dc.contributor.authorGoldflam, M.
dc.contributor.authorLiu, M.
dc.contributor.authorDominguez, G.
dc.contributor.authorThiemens, M.
dc.contributor.authorFogler, M.M.
dc.contributor.authorCastro Neto, A.H.
dc.contributor.authorLau, C.N.
dc.contributor.authorAmarie, S.
dc.contributor.authorKeilmann, F.
dc.contributor.authorBasov, D.N.
dc.date.accessioned2014-10-16T09:47:46Z
dc.date.available2014-10-16T09:47:46Z
dc.date.issued2014-02-12
dc.identifier.citationWagner, M., Fei, Z., McLeod, A.S., Rodin, A.S., Bao, W., Iwinski, E.G., Zhao, Z., Goldflam, M., Liu, M., Dominguez, G., Thiemens, M., Fogler, M.M., Castro Neto, A.H., Lau, C.N., Amarie, S., Keilmann, F., Basov, D.N. (2014-02-12). Ultrafast and nanoscale plasmonic phenomena in exfoliated graphene revealed by infrared pump-probe nanoscopy. Nano Letters 14 (2) : 894-900. ScholarBank@NUS Repository. https://doi.org/10.1021/nl4042577
dc.identifier.issn15306984
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/98497
dc.description.abstractPump-probe spectroscopy is central for exploring ultrafast dynamics of fundamental excitations, collective modes, and energy transfer processes. Typically carried out using conventional diffraction-limited optics, pump-probe experiments inherently average over local chemical, compositional, and electronic inhomogeneities. Here, we circumvent this deficiency and introduce pump-probe infrared spectroscopy with ∼20 nm spatial resolution, far below the diffraction limit, which is accomplished using a scattering scanning near-field optical microscope (s-SNOM). This technique allows us to investigate exfoliated graphene single-layers on SiO2 at technologically significant mid-infrared (MIR) frequencies where the local optical conductivity becomes experimentally accessible through the excitation of surface plasmons via the s-SNOM tip. Optical pumping at near-infrared (NIR) frequencies prompts distinct changes in the plasmonic behavior on 200 fs time scales. The origin of the pump-induced, enhanced plasmonic response is identified as an increase in the effective electron temperature up to several thousand Kelvin, as deduced directly from the Drude weight associated with the plasmonic resonances. © 2014 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/nl4042577
dc.sourceScopus
dc.subjectDirac plasmon
dc.subjectGraphene
dc.subjectnear-field microscopy
dc.subjectpump-probe
dc.subjects-SNOM
dc.subjecttime-resolved spectroscopy
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1021/nl4042577
dc.description.sourcetitleNano Letters
dc.description.volume14
dc.description.issue2
dc.description.page894-900
dc.description.codenNALEF
dc.identifier.isiut000331343900077
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

92
checked on Aug 14, 2019

WEB OF SCIENCETM
Citations

74
checked on Aug 7, 2019

Page view(s)

57
checked on Aug 17, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.