(Left) Scanning transmission electron microscopy (STEM) image of core@multi-shell nanoparticles (Right) Schematic of core@multi-shell nanostructure and magnified STEM image. Credit: Korea Institute of ...

Photon upconversion involves a series of non-linear optical processes where the sequential absorption of two or more photons leads to the emission of a single photon with energy greater than the sum ...

Researchers developed core@multi-shell upconversion nanoparticles that emit full-color light, enhancing color accuracy in advanced display technologies. (Nanowerk News) Dr. Ho Seong Jang and ...

Nanoparticles that exhibit upconversion luminescence are emerging as a critical tool in modern science, bridging the gap between nanoscale engineering and practical applications in biomedicine, ...

Researchers have unveiled a novel concept termed 'supercritical coupling' that enables several folds increase in photon upconversion efficiency. This discovery not only challenges existing paradigms, ...

In a collaboration with the group of Prof. Ben Feringa at Groningen University, Prof. Hong Zhang and his PhD graduate Dr Kefan Wu at the University of Amsterdam’s Van ‘t Hoff Institute for Molecular ...

Figure illustrates the principle of “supercritical coupling” and directive upconversion emission through supercritical edge BIC coupling. It shows the layout of the photonic-crystal nanoslab with unit ...