Tip shape dependence of the light emission efficiency for the scanning tunneling microscope

Y. Uehara, Y. Suda, S. Ushioda, K. Takeuchi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We have investigated the relation between the scanning-tunneling-microscope (STM) tip shape and the efficiency of STM light emission. The light intensity radiated by a current source placed in the tip-sample gap of the STM was calculated for various shapes of the tip using the finite differential time domain method. We found that the highest emission efficiency is obtained for the pyramidal tip with the flat top of 4 nm width and the apex angle of 90°C.

Original languageEnglish
Pages (from-to)1718-1720
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number11
DOIs
Publication statusPublished - 2001 Sep 10

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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