We introduced a metric named plasmon character index (PCI) to identify plasmons. It is consistent with previous understandings and previous theory, and the advantage of PCI is in both its accuracy and efficiency.
This is a completely new direction our group is exploring, and it is just the first step. This paper is adapted from James’s thesis background exam document.
It is always interesting to look at phenomena that are at the intersection of quantum and classical worlds. 🙂