Quantum mechanical limit to plasmonic enhancement as observed by surface-enhanced Raman scattering

Grants

Funding Acknowledgements

This work was supported by the National Science Foundation (NSF, grant ECCS-1201687) and by the Harvard Quantum Optics Center. Nanofabrication and electron microscopy were carried out in the Center for Nanoscale Science at Harvard University, a member of the National Nanotechnology Infrastructure Network. We thank D. Wang, Y. Luan, X. Wang and A. Graham at Harvard University for the discussions on the sample fabrication and the TEM characterization.