Zhenda Xie

Giant anomalous exciton-multiphoton nonlinearities in layered hybrid perovskites

Abstract Directly full-color frequency-upconversion under high-order multiphoton absorption (MPA) nonlinearities in NIR-III (1550–1870 nm) and NIR-IV (2100–2300 nm) windows is highly desirable for advanced photonics and bioimaging. However, it has remained beyond the reach of cur...