Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
Zur Ablage hinzufügen
 Lokale TagsFreigabegeschichteDetailsÜbersicht
  Ultrafast changes in the far-infrared conductivity of carbon nanotubes

Frischkorn, C., Kampfrath, T., von Volkmann, K., Perfetti, L., & Wolf, M. (2008). Ultrafast changes in the far-infrared conductivity of carbon nanotubes. In IEEE Digest: 33rd Int. Conf. on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (pp. 185-185). New York, NY 10017, USA: IEEE.

Item is

 

einblenden: alle ausblenden: alle

Basisdaten

einblenden: ausblenden:
Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0010-FBA3-F Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0010-FBA4-D
Genre: Konferenzbeitrag

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Frischkorn, Christian1, Autor           
Kampfrath, Tobias1, Autor           
von Volkmann, Konrad1, Autor           
Perfetti, Luca, Autor
Wolf, Martin1, Autor           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: The ultrafast charge-carrier dynamics in single-wall carbon nanotubes (NTs) have been investigated by time-resolved THz spectroscopy. Both the equilibrium and non-equilibrium conductivity data of the NTs in the far-infrared (FIR) spectral range from 1 to 40 THz are dominated by optical transitions across the band gap of tubes with gap energies of ~ 10 meV. A simple model based on an ensemble of two-level systems excellently explains all experimental findings. In particular, the surprisingly weak temperature dependence of the FIR conductivity has been shown to arise from tube-to-tube variation of the chemical potential which is ~ 100 meV in our sample. The results strongly suggest to use the temperature dependence of the FIR conductivity as a very sensitive and contact-free probe of the NT sample purity. Finally, the relaxation of the photo-excited NT sheet on a picosecond time scale mainly reflects the cooling of hot phonons which is about five times faster than in graphite. This points to much stronger lattice anharmonicities in NTs.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2008-11-05
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 436340
URI: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4665509
DOI: 10.1109/ICIMW.2008.4665509
 Art des Abschluß: -

Veranstaltung

einblenden:
ausblenden:
Titel: 33rd Int. Conf. on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)
Veranstaltungsort: Pasadena, CA
Start-/Enddatum: 2008-09-15 - 2008-09-19

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: IEEE Digest: 33rd Int. Conf. on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: New York, NY 10017, USA : IEEE
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: 185 - 185 Identifikator: ISBN: 978-1-4244-2119-0