Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG

Ertel K, Kohl U, Lehmann J, Merschdorf M, Pfeiffer W, Thon A, Voll S, Gerber G (1999)
Appl. Phys. B 68(3): 439-445.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
Time-resolved two-color two-photon photoemission experiments are used to investigate the electronic dynamics in highly oriented pyrolytic graphite (HOPG) and in Ag nanoparticles grown on HOPG. The multiphoton photoemission using 267 nm and 400 nm excitation is presented and discussed. For the first time the known unoccupied state on graphite 3.6 eV above the Fermi level can be identified as an image potential state. A lower limit of 60 fs is given for the lifetime of this state. The two-color experiments reveal that the carrier relaxation deduced from time-resolved experiments is influenced by feeding of the intermediate states. First results of the strongly enhanced multiphoton photoemission from Ag nanoparticles on HOPG at 400 nm wavelength are presented. This observation is explained by the excitation of the surface plasmon and its subsequent decay.
Erscheinungsjahr
Zeitschriftentitel
Appl. Phys. B
Band
68
Zeitschriftennummer
3
Seite
439-445
ISSN
eISSN
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Ertel K, Kohl U, Lehmann J, et al. Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG. Appl. Phys. B. 1999;68(3):439-445.
Ertel, K., Kohl, U., Lehmann, J., Merschdorf, M., Pfeiffer, W., Thon, A., Voll, S., et al. (1999). Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG. Appl. Phys. B, 68(3), 439-445. doi:10.1007/s003400050646
Ertel, K., Kohl, U., Lehmann, J., Merschdorf, M., Pfeiffer, W., Thon, A., Voll, S., and Gerber, G. (1999). Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG. Appl. Phys. B 68, 439-445.
Ertel, K., et al., 1999. Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG. Appl. Phys. B, 68(3), p 439-445.
K. Ertel, et al., “Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG”, Appl. Phys. B, vol. 68, 1999, pp. 439-445.
Ertel, K., Kohl, U., Lehmann, J., Merschdorf, M., Pfeiffer, W., Thon, A., Voll, S., Gerber, G.: Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG. Appl. Phys. B. 68, 439-445 (1999).
Ertel, K., Kohl, U., Lehmann, J., Merschdorf, M., Pfeiffer, Walter, Thon, A., Voll, S., and Gerber, G. “Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG”. Appl. Phys. B 68.3 (1999): 439-445.