We are a spectroscopy group studying biomolecules and nanomaterials at the single molecule level. Single Molecule Spectroscopy is a very powerful way to analyze heterogeneity and intrinsic complexity since it allows us to build up a picture of what is happening in an ensemble (sample), one molecule at a time.
As an analogy, think about how one goes about selecting the best players for a sports team. First, you need to find out what skills a player has individually (a single molecule) and then find out how those skills are used in the team (ensemble).