Please use this identifier to cite or link to this item:
https://doi.org/10.1021/nl4042577
DC Field | Value | |
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dc.title | Ultrafast and nanoscale plasmonic phenomena in exfoliated graphene revealed by infrared pump-probe nanoscopy | |
dc.contributor.author | Wagner, M. | |
dc.contributor.author | Fei, Z. | |
dc.contributor.author | McLeod, A.S. | |
dc.contributor.author | Rodin, A.S. | |
dc.contributor.author | Bao, W. | |
dc.contributor.author | Iwinski, E.G. | |
dc.contributor.author | Zhao, Z. | |
dc.contributor.author | Goldflam, M. | |
dc.contributor.author | Liu, M. | |
dc.contributor.author | Dominguez, G. | |
dc.contributor.author | Thiemens, M. | |
dc.contributor.author | Fogler, M.M. | |
dc.contributor.author | Castro Neto, A.H. | |
dc.contributor.author | Lau, C.N. | |
dc.contributor.author | Amarie, S. | |
dc.contributor.author | Keilmann, F. | |
dc.contributor.author | Basov, D.N. | |
dc.date.accessioned | 2014-10-16T09:47:46Z | |
dc.date.available | 2014-10-16T09:47:46Z | |
dc.date.issued | 2014-02-12 | |
dc.identifier.citation | Wagner, 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.issn | 15306984 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/98497 | |
dc.description.abstract | Pump-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.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/nl4042577 | |
dc.source | Scopus | |
dc.subject | Dirac plasmon | |
dc.subject | Graphene | |
dc.subject | near-field microscopy | |
dc.subject | pump-probe | |
dc.subject | s-SNOM | |
dc.subject | time-resolved spectroscopy | |
dc.type | Article | |
dc.contributor.department | PHYSICS | |
dc.description.doi | 10.1021/nl4042577 | |
dc.description.sourcetitle | Nano Letters | |
dc.description.volume | 14 | |
dc.description.issue | 2 | |
dc.description.page | 894-900 | |
dc.description.coden | NALEF | |
dc.identifier.isiut | 000331343900077 | |
Appears in Collections: | Staff Publications |
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