Integrated Sideband-Resolved SERS with a Dimer on a Nanobeam Hybrid

In analogy to cavity optomechanics, enhancing specific sidebands of a Raman process with narrowband optical resonators would allow for parametric amplification, entanglement of light and molecular vibrations, and reduced transduction noise. We report on the demonstration of waveguide-addressable sideband-resolved surface-enhanced Raman scattering (SERS). We realized a hybrid plasmonic-photonic resonator consisting of a 1D photonic crystal cavity decorated with a sub-20 nm gap dimer nanoantenna. Hybrid resonances in the near-IR provide designer Q factors of 1000, and Q/V = o?3/106 thorn -1, with SERS signal strength on par with levels found in state-of-the-art purely plasmonic systems. We evidence Fano line shapes in the SERS enhancement of organic molecules, and quantitatively separate out the pump enhancement and optical reservoir contributions.

Automated summary

An experiment demonstrating waveguide-addressable sideband-resolved surface-enhanced Raman scattering (SERS) using a hybrid plasmonic-photonic resonator is reported. The hybrid resonator consists of a 1D photonic crystal cavity decorated with a sub-20 nm gap dimer nanoantenna. The SERS signal strength is comparable to state-of-the-art purely plasmonic systems, and Fano line shapes are observed in the SERS enhancement of organic molecules.