Polarization-Dependent Surface-Enhanced Raman Scattering via Aligned Gold Nanorods in Poly(Vinyl Alcohol) Film |
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| Authors: | Jun Tao Yonghua Lu Junxue Chen Dawei Lu Chunchong Chen Pei Wang Hai Ming |
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| Institution: | (1) Department of Optics and Optical Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui, 230026, People’s Republic of China; |
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| Abstract: | A low-cost and effective surface-enhanced Raman scattering (SERS) substrate consisting of aligned gold nanorods is obtained
by stretching the poly(vinyl alcohol) nanorods composite film doped with the probe molecule. The SERS intensity of characteristic
vibrational band of the probe is observed obviously dependent on the angle (θ) between incident polarization and major axis of nanorod. The relationship between them manifests a cos2
θ dependence. The result is illustrated from both the localized field enhancement and optical antenna effect of gold nanorod.
The finite element method calculation is also performed to further confirm the conclusion. |
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