TY - JOUR
T1 - Intensity enhancement of vibrational sum frequency generation by gap-mode plasmon resonance
AU - Okuno, Masanari
AU - Tokimoto, Taichi
AU - Eguchi, Miharu
AU - Kano, Hideaki
AU - Ishibashi, Taka Aki
N1 - Funding Information:
This study was partially supported by Grants-in-Aid for Scientific Research (KAKENHI) from the Ministry of Education Culture, Sports, Science, and Technology of Japan (Grant No. 24350010 , Scientific Research (B); No. 26104504, Innovative Areas 2503; No. 25888004, Research Activity Start-up) and by a Grant for Basic Science Research Projects from the Sumitomo Foundation .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/10/16
Y1 - 2015/10/16
N2 - A metal sphere-plane structure consisting of gold nanoparticles, p-methylbenzenethiol and a gold substrate was measured by vibrational sum frequency generation spectroscopy with four excitation wavelengths, 630, 680, 720, and 780 nm. The enhancement factors of Raman signals were estimated to be 250 and 104 for the 532 and 647 nm excitation. Contrastingly, we found that the enhancements of VSFG signals were much smaller, a factor of 5 at maximum. We speculate that the small enhancement factor of VSFG signals is due to the coherent nature of the VSFG process or the extinction of the infrared laser by the gold nanoparticles.
AB - A metal sphere-plane structure consisting of gold nanoparticles, p-methylbenzenethiol and a gold substrate was measured by vibrational sum frequency generation spectroscopy with four excitation wavelengths, 630, 680, 720, and 780 nm. The enhancement factors of Raman signals were estimated to be 250 and 104 for the 532 and 647 nm excitation. Contrastingly, we found that the enhancements of VSFG signals were much smaller, a factor of 5 at maximum. We speculate that the small enhancement factor of VSFG signals is due to the coherent nature of the VSFG process or the extinction of the infrared laser by the gold nanoparticles.
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U2 - 10.1016/j.cplett.2015.08.067
DO - 10.1016/j.cplett.2015.08.067
M3 - Article
AN - SCOPUS:84941930803
VL - 639
SP - 83
EP - 87
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -