Single molecule spectrum of rhodamine 6G on highly oriented pyrolytic graphite

Y. Uehara, S. Ushioda

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29 Citations (Scopus)


We have measured the scanning tunneling microscope (STM) light emission spectrum of a single molecule of rhodamine 6G (R6G) adsorbed on highly oriented pyrolytic graphite (HOPG). Since the HOPG substrate radiates no STM light, we have succeeded in observing the spectrum radiated by R6G alone. The spectrum agrees well with the photoluminescence spectrum of R6G on HOPG with the exception of two structures that may arise from a triplet state whose transition is forbidden in photoluminescence. Based on this agreement, we have determined the STM light emission mechanism of adsorbed R6G.

Original languageEnglish
Article number181905
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number18
Publication statusPublished - 2005 May 2
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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