I was just trying to help you organize your search. There are three broad classes of devices. Those based on a photoelectric effects, those based on heat (bolometric) and those based on a chemical change (actinometric).
As for any device operating on a completely new principle discovered after 2000, I don't know of any. If you just want a device that was patented after 2000, that is a completely different question. Remember, new principles can't (in theory) be patented. Patents are for inventions, i.e., the reduction to practice of a principle. The underlying principle can be old as the hills.
John