Study on Enhancement of Tunnelling-Induced Fluorescence from Porphyrin Film by Substrate Plasmon
Study on Enhancement of Tunnelling-Induced Fluorescence from Porphyrin Film by Substrate Plasmon
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DOI：
10.1088/1742-6596/61/1/175
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
R. Nishitani;Hongwen Liu;A. Kasuya;H. Iwasaki
中科院分区：
文献类型：
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作者：
R. Nishitani;Hongwen Liu;A. Kasuya;H. Iwasaki
我们研究了等离子体场强对金衬底上的卟啉(H_2TBPP)薄膜STM诱导发光的影响。我们测量了STM诱导发光的光谱分辨光子强度图，发现具有不同光谱来源的不同光谱区域的光子图具有相似的对比度，即分子荧光和来自衬底的局域等离子体诱导发光。这说明分子荧光与Au衬底的等离子体场强密切相关，并支持Au衬底的局域等离子体场强增强了Au表面上的卟啉薄膜的STM诱导的荧光。
We have studied the effect of the plasmon field on the STM-induced luminescence from porphyrin (H2TBPP) film on Au substrate. We have measured the spectrally resolved photon intensity map for the STM-induced luminescence, and found the similarity of their contrast for the photon maps for different spectral regions with different spectral origins, i.e. molecular fluorescence and the local plasmon induced luminescence from the substrate. This fact indicates that the molecular fluorescence is closely related with the plasmon field of the substrate, and supports that the STM-induced fluorescence from porphyrin film on Au is enhanced by the local plasmon field of the Au substrate.