Subtraction of one-two-three photonshttps://www.nqo.uni-bonn.de/news-info/nqo-news/paper-on-multi-photon-subtraction-published/2021-publications-three-photon-absorber-for-poster.png/viewhttps://www.nqo.uni-bonn.de/news-info/nqo-news/paper-on-multi-photon-subtraction-published/2021-publications-three-photon-absorber-for-poster.png/@@images/image-1200-61d80573caf86ff341a6dcd09cde062f.png