Journal Article 5 two-photon absorption 2D Ruddlesden-Popper perovskites 1 CC2 method 1 Research Support, Non-U.S. Gov't 1 Review 1 density functional theory 1 mehr ... direct laser writing 1 excited states 1 excitonic effects 1 gap states 1 microstructures 1 near-infrared light 1 nonlinear optics 1 photocatalysis 1 photoreduction 1 quasi-2D perovskites 1 range-separated hybrid functionals 1 rational design 1 spatially extended states 1 sub-bandgap photodetection 1 up-conversion photoluminescence 1 vibronic coupling 1 weniger ...