Anomalous polarized absorbance spectra of aligned Ag nanorod arrays

被引:20
作者
Chaney, S. B. [1 ]
Zhang, Z. -Y. [1 ]
Zhao, Y. -P. [1 ]
机构
[1] Univ Georgia, Dept Phys & Astron, Nanoscale Sci & Engn Ctr, Athens, GA 30602 USA
基金
美国国家科学基金会;
关键词
SURFACE-ENHANCED RAMAN; OPTICAL-PROPERTIES; METAL; SCATTERING; MOLECULES;
D O I
10.1063/1.2267161
中图分类号
O59 [应用物理学];
学科分类号
摘要
The polarized absorbance spectra of Ag nanorod array substrates with different lengths prepared by oblique angle deposition were studied in detail. An anomalous anisotropic absorbance was obtained which follows the relation alpha(theta)=-ln[A(1+B sin(2) theta)](beta), where theta is the polarization angle with respect to p-polarization direction. The exponent beta(< 0.5) is wavelength independent. This result cannot be interpreted by the conventional anisotropic effective medium theory, and the possible origin is the inhomogeneous size and orientation distributions that cause the variations in transmission and polarization.
引用
收藏
页数:3
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共 17 条
[11]   EFFECTIVE DIELECTRIC FUNCTION MODELING OF INHOMOGENEOUS AND ANISOTROPIC SILVER FILMS [J].
MENDOZAGALVAN, A ;
MARTINEZ, G ;
MARTINEZ, JL .
PHYSICA A, 1994, 207 (1-3) :365-371
[12]   Probing single molecules and single nanoparticles by surface-enhanced Raman scattering [J].
Nie, SM ;
Emery, SR .
SCIENCE, 1997, 275 (5303) :1102-1106
[13]   Surface-enhanced Raman scattering of molecules adsorbed on gold nanorods: off-surface plasmon resonance condition [J].
Nikoobakht, B ;
Wang, JP ;
El-Sayed, MA .
CHEMICAL PHYSICS LETTERS, 2002, 366 (1-2) :17-23
[14]   THEORY OF ANGULAR SELECTIVE TRANSMITTANCE IN OBLIQUE COLUMNAR THIN-FILMS CONTAINING METAL AND VOIDS [J].
SMITH, GB .
APPLIED OPTICS, 1990, 29 (25) :3685-3693
[15]   Langmuir-Blodgett silver nanowire monolayers for molecular sensing using surface-enhanced Raman spectroscopy [J].
Tao, A ;
Kim, F ;
Hess, C ;
Goldberger, J ;
He, RR ;
Sun, YG ;
Xia, YN ;
Yang, PD .
NANO LETTERS, 2003, 3 (09) :1229-1233
[16]   Surface-enhanced Raman spectroscopy using metallic nanostructures [J].
Vo-Dinh, T .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 1998, 17 (8-9) :557-582
[17]   Polarized surface enhanced raman and absorbance spectra of aligned silver nanorod arrays [J].
Zhao, YP ;
Chaney, SB ;
Shanmukh, S ;
Dluhy, RA .
JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (07) :3153-3157