Photon emission induced by tunneling electrons from a Cu(1 0 0) surface covered with porphyrin molecules

D. Fujita, T. Ohgi, W. L. Deng, K. Ishige, T. Okamoto, S. Yokoyama, T. Kamikado, S. Mashiko

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24 Citations (Scopus)

Abstract

An ultrahigh-vacuum scanning tunneling microscope with an optically transparent tip was used to excite photon emission from a clean Cu(1 0 0) surface and a sub-monolayer of Cu-tetra-[3,5-di-t-butylphenyl]porphyrin (Cu-TBPP) molecules chemisorbed on a Cu(1 0 0) surface. Photons generated in a nanometer-scale area just under the tip were collected within the near-field region through the apex of the optical fiber tip. Two kinds of mechanisms for the photon emission from a Cu-TBPP/Cu(1 0 0) surface are proposed. The quantum efficiency for molecular fluorescence induced by inelastic tunneling was estimated to be ∼3 × 10-6 photons/electron.

Original languageEnglish
Pages (from-to)702-707
Number of pages6
JournalSurface Science
Volume493
Issue number1-3
DOIs
Publication statusPublished - Nov 1 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Fujita, D., Ohgi, T., Deng, W. L., Ishige, K., Okamoto, T., Yokoyama, S., Kamikado, T., & Mashiko, S. (2001). Photon emission induced by tunneling electrons from a Cu(1 0 0) surface covered with porphyrin molecules. Surface Science, 493(1-3), 702-707. https://doi.org/10.1016/S0039-6028(01)01286-9