Platform for surface-enhanced Raman scattering in layered quantum materials

Transferable Optical Enhancement Nanostructures by Gapless Stencil Lithography

“…At this point, we would like to stress that the maximum enhancement factor we obtain is an order of magnitude larger than previously reported SERS of graphene using nanodisk arrays, and almost 2 orders of magnitude higher than alternative approaches to SERS of 2D materials. − We primarily attribute this large difference to the close proximity between the plasmonic nanostructure and the sample, achieved by eliminating the adhesion layer and resulting in a better overlap of the field maximum and the emitter positions. We also emphasize again that the nanostructures are designed as disks to enhance the signal uniformly and conserving the incoming polarization direction, and thus enable polarization-resolved Raman/PL studies, which is generally not possible with tip-enhanced Raman spectroscopy or nanoparticle-on-mirror cavities (see Supporting Information Note 2).…”