Whispering gallery microprobe opens up new opportunities for optical spectroscopy

https://phys.org/news/2023-10-gallery-microprobe-opportunities-optical-spectroscopy.html

"Nano-plasmonic hotspots coupled with WGMs via phase-matched cavity-antenna coupling... 2 orders magnitude enhancement... sub-milliwatt continuous-wave pump power... Raman-based material analysis and chemical imaging... combination of WGM microresonators and nanoplasmonic SERS structures... phase-matching manifests due to WGMs' guided-wave nature... enhancing conventional SERS and 2D scanned Raman imaging using microprobe configuration... better and potentially more compact SERS test platform"

Related: Unbreakable barrier broken: new superlens technique will finally allow scientists to see the infinitesimal
https://thedebrief.org/unbreakable-barrier-broken-new-superlens-technique-will-finally-allow-scientists-to-see-the-infinitesimal/