Abstract
An aluminum bow-tie nano-antenna is combined with the resonance Raman effect 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-field Raman peaks for several strong infrared modes. We achieve a gain of ∼ 10 5 in signal intensity from the near field 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.
| Original language | English |
|---|---|
| Article number | 113116 |
| Journal | Applied Physics Letters |
| Volume | 101 |
| Issue number | 11 |
| DOIs | |
| State | Published - Sep 10 2012 |
Funding
We would like to thank National Institutes of Health for funding this research (Grant No. R21CA132075). This research was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy.