Zhiguo Zhang

TL;DR: Investigation of the overheating caused by 980 nm excitation laser light in UC bioimaging and imaging and spectroscopy analysis of UC photoluminescence demonstrated that a 915 nm laser can serve as a new promising excitation light for UC animal imaging.

TL;DR: It was found that imaging with highly efficient upconverting nanocrystals leads to an exceptionally high contrast compared to traditional downconverting fluorophores due to the absence of autofluorescence.

TL;DR: In this paper, a systematic investigation of spectroscopic properties of lanthanide ions (Z=57-71) was carried out using time-resolved laser-induced fluorescence following one- or two-photon excitations.

TL;DR: Radiative lifetimes have been measured for two excited levels of Ce IV using the time-resolved laser-induced fluorescence technique using a suitable magnetic field to reduce the recombination between electrons and the ions and thus the background light from the recombinations.

TL;DR: Power dependence analyses indicate that the expected inefficient four- and five- photon processes have been switched into efficient two-photon processes due to a super saturation UC phenomenon that employs consecutive saturations at the intermediate states.