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STM tip-enhanced photoluminescence from porphyrin film |
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| Authors: | R. Nishitani H.W. Liu H. Miyahira H. Iwasaki |
| Affiliation: | a Department of Mathematics, Physics and Computer Aided Science, Kyushu Institute of Technology, Fukuoka 804-8550, Japan b The Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan c Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan d Department of Electrical and Electronic Engineering, University of the Ryukyus, Okinawa 903-0213, Japan |
| Abstract: | Tunneling electrons-induced molecular fluorescence in organic film is enhanced by the surface plasmons. The plasmon enhancement can be expected not only by the plasmons of the substrate but also by the noble metal tip of scanning tunneling microscope (STM). In this report we investigate the tip effect in photoluminescence of meso-tetrakis(3,5-di-tertiarybutyl-phenyl)porphyrin (H2TBPP) film on indium tin oxide (ITO) combined with a STM. The experimental result shows the PL of molecules is enhanced by an Ag tip. This enhancement factor is evaluated larger than 2000. |
| Keywords: | Photoluminescence Porphyrin Scanning tunneling microscope-induced luminescence |
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