Imaging using two-photon absorption (2PA) produced photoluminescence is reported to be more advantageous than one-photon induced photoluminescence due to its ability to provide three-dimensional resolution. Additionally, when excitation is conducted in the NIR range, it enables greater penetration depth. The PPAB cored molecules exhibit strong performance in the NIR range, with 2PA cross sections of approximately 3000 GM at the telecommunication window at a wavelength of around 1500-1700 nm. 29