Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Application of attenuated total reflection surface-plasmon-polariton Raman spectroscopy to gold and copper

Not Accessible

Your library or personal account may give you access

Abstract

An attenuated total reflection (ATR) method to excite the surface plasmon polariton (SPP) was applied to gold and copper to improve the sensitivity level of classical Raman spectroscopy. Reflectivity and Raman band intensity from copper phthalocyanine (CuPc) adsorbates on these metals were measured in an Otto configuration as a function of the angle of incidence and gap size at various excitation wavelengths. The SPP’s on gold and copper were most efficiently excited at a wavelength of 632.8 nm according to the sufficiently large real part and the small imaginary part in the dielectric constants. It yields an enhancement factor of approximately 50 and 23 for Raman band intensity from CuPc 6 nm thick on gold and copper, respectively. Furthermore the significantly larger enhancement factor of ∼100 was obtained for a self-assembled monolayer of p-nitrothiophenol on gold at 632.8-nm excitation, probably owing to its smaller imaginary part value. It enabled us to observe the electrochemical reduction to p-aminothiophenol in situ and gave clear evidence of charge transfer resonance as observed for the silver system. Conclusively, the ATR–SPP method is essential to enhancing a quite weak Raman signal from adsorbates on gold and copper surfaces as well as silver.

© 1997 Optical Society of America

Full Article  |  PDF Article
More Like This
Experimental verification of a virtual-mode treatment for the excitation of surface plasmon polaritons by attenuated total reflection

Manfred Klopfleisch, Martin Golz, and Udo Trutschel
Appl. Opt. 31(24) 5017-5021 (1992)

Interpretation of attenuated-total-reflection dips observed in surface plasmon resonance

Takashi Wakamatsu and Kazuhiro Saito
J. Opt. Soc. Am. B 24(9) 2307-2313 (2007)

Surface enhanced Raman scattering (SERS) by molecules adsorbed at spherical particles

M. Kerker, D.-S. Wang, and H. Chew
Appl. Opt. 19(19) 3373-3388 (1980)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (17)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (14)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved