Prism-coupled scanning tunneling microscope light emission spectroscopy of Au film covered with self-assembled alkanethiol monolayer

Jamal Uddin Ahamed, Tomonori Sanbongi, Satoshi Katano, Yoichi Uehara

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have investigated scanning tunneling microscope (STM) light emission from bare and alkanethiol self-assembled monolayer (SAM)-covered Au films in the Kretschmann geometry. The films were deposited on the flat bottom of a hemispherical prism, and the STM light emissions from the tip-sample gap into the vacuum (tip-side emission) and into the prism (prism-side emission) were measured. The prism-side emission was much stronger than the tip-side emission for the bare Au film. Theoretical analysis revealed that this enhancement of emission intensity is caused by the fact that surface plasmon polaritons (SPPs) localized at the Au surface become radiative on the prism side. This geometry was applied to the investigations of STM light emission from the Au film covered with an alkanethiol SAM. The prism-side emission was successfully detected by virtue of the enhancement of STM light emission.

Original languageEnglish
Article number08LB09
JournalJapanese journal of applied physics
Volume49
Issue number8 PART 4
DOIs
Publication statusPublished - 2010 Aug 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Prism-coupled scanning tunneling microscope light emission spectroscopy of Au film covered with self-assembled alkanethiol monolayer'. Together they form a unique fingerprint.

  • Cite this