Phase-driven progress in nanophotonic biosensingOACSTPCD

In the continuous pursuit of enhancing the sensitivity of nanophotonic biosensors by leveraging phase phenomena,a recent development involved the engineering of an atomically thin Ge2Sb2Te5 layer on a silver nanofilm to generate large Goos-Hänchen-shifts associated with phase singularities.The resulting detection limit reached～7× 10-7 RIU.