Near-Field Enhanced UV Resonance Raman Spectroscopy Using Aluminum Bow-tie Nano-antenna

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4746747· OSTI ID:1051447

Li, Ling ^[1]; Lim, Shuang Fang ^[1]; Puretzky, Alexander A ^[2]; Riehn, Robert ^[1]; Hallen, Hans ^[1]

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1. North Carolina State University
2. ORNL

An aluminum bow-tie nano-antenna is combined with the resonance Raman eect in the deep ultraviolet to dramatically increase the sensitivity of Raman spectra to a small volume of material, such as benzene used here. We further demonstrate gradient-eld Raman peaks for several strong IR modes. We achieve a gain of 105 in signal intensity from the near eld enhancement due to the surface plasmon resonance in the aluminum nanostructure. The on-line resonance enhancement contributes another factor of several thousands, limited by the laser line width. Thus, an overall gain of hundreds of million is achieved.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1051447
• Journal Information: Applied Physics Letters, Vol. 101, Issue 11; ISSN 0003-6951
• Country of Publication: United States
• Language: English