Abstract
two-dimensional (2D) nanoplatelets (NPs) with emission wavelengths of 469 nm and 527 nm were synthesized and characterized. Femtosecond transient absorption spectra revealed hot carrier cooling times of and for 469 nm and 527 nm 2D NPs, respectively. Importantly, the 2D NPs exhibit giant two-, three-, four-, and five-photon absorption cross-sections, reaching GM at 830 nm, at 1300 nm, at 1600 nm, and at 2200 nm, respectively, which are 3–8 orders of magnitude larger, compared to specially designed organic molecules.
© 2019 Optical Society of America
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