Mushtaq, A., Pradhan, B., Kushavah, D., Zhang, Y., Wolf, M., Schrenker, N., et al. (2021). Third-Order Nonlinear Optical Properties and Saturation of Two-Photon Absorption in Lead-Free Double Perovskite Nanocrystals under Femtosecond Excitation. ACS Photonics, 8(11), 3365-3374. doi:10.1021/acsphotonics.1c01351.