Metallic membranes with subwavelength complementary patterns: Distinct substrates for surface-enhanced raman scattering

Qingzhen Hao, Yong Zeng, Bala Krishna Juluri, Xiande Wang, Brian Kiraly, I. Kao Chiang, Lasse Jensen, Douglas H. Werner, Vincent H. Crespi, Tony Jun Huang

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We present a detailed comparison of surface-enhanced Raman spectroscopy (SERS) signals from metallic nanoparticle arrays and their complementary hole arrays. Using an analytical model for local field enhancement, we show that the SERS enhancements of the hole arrays are closely related to their transmission spectra. This trend is experimentally confirmed and characterized by a cos 4θ dependence of the SERS signal on the excitation polarization angle θ. The particle arrays, on the other hand, exhibit quite different behavior because of the existence of considerable evanescent modes in the near field. Their maximal local field gains appear at wavelengths generally much larger than their localized surface plasmonic resonant wavelengths.

Original languageEnglish (US)
Pages (from-to)5472-5477
Number of pages6
JournalACS nano
Volume5
Issue number7
DOIs
StatePublished - Jul 26 2011

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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