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Terahertz Time Domain Spectroscopy to Detect Low-Frequency Vibrations of Double-Walled Carbon Nanotubes

hal.structure.identifierDepartment of Physics
hal.structure.identifierCenter for Ultrafast Laser Applications
dc.contributor.authorKUMAR, Sunil
hal.structure.identifierDepartment of Physics
hal.structure.identifierCenter for Ultrafast Laser Applications
dc.contributor.authorKAMARAJU, Natrajan
hal.structure.identifierMER Corporation
dc.contributor.authorMORAVSKY, Alexander
hal.structure.identifierMER Corporation
dc.contributor.authorLOUTFY, Raouf O
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorTONDUSSON, Marc
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorFREYSZ, Eric
hal.structure.identifierDepartment of Physics
hal.structure.identifierCenter for Ultrafast Laser Applications
dc.contributor.authorSOOD, Ajay Kumar
dc.date.created2010-05-12
dc.date.issued2010-09
dc.identifier.issn1434-1948
dc.description.abstractEnWe have measured the frequency-dependent real index of refraction and extinction coefficient (and hence the complex dielectric function) of a free-standing double-walled carbon nanotube film of thickness 200 nm by using terahertz time domain spectroscopy in the frequency range 0.1 to 2.5 THz. The real index of refraction and extinction coefficient have very high values of approximately 52 and 35, respectively, at 0.1 THz, which decrease at higher frequencies. Two low-frequency phonon modes of the carbon nanotubes at 0.45 and 0.75 THz were clearly observed for the first time in the real and imaginary parts of the complex dielectric function along with a broad resonance centred at around 1.45 THz, the latter being similar to that in single-walled carbon nanotubes assigned to electronic excitations. Our experiments bring out a possible application of double-walled carbon nanotube films as a neutral density filter in the THz range.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enCarbon
dc.subject.enNanotubes
dc.subject.enTime-resolved spectroscopy
dc.subject.enDielectric function
dc.subject.enLow-frequency phonons
dc.title.enTerahertz Time Domain Spectroscopy to Detect Low-Frequency Vibrations of Double-Walled Carbon Nanotubes
dc.typeArticle de revue
dc.identifier.doi10.1002/ejic.201000524
bordeaux.journalEuropean Journal of Inorganic Chemistry
bordeaux.page4363-4366
bordeaux.volume2010
bordeaux.issue27
bordeaux.peerReviewedoui
hal.identifierhal-00671160
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00671160v1
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