By harvesting the energy destined for nonradiative decay and redirecting energy flux in dye-sensitized Er³⁺-based nanoparticles via an active shell (Yb³⁺), a three-order-of-magnitude enhancement at 1525 nm was achieved. The mechanistic insights and design principles inform the development of efficient NIR-II nanoprobes, demonstrating substantial potential for advancing vascular biology.

POSTECH-KRISO team develops an ultra-light underwater lens for broadband low-frequency sound focusing.

POSTECH Identifies True Cause of Prussian Blue Performance Loss — Surface Oxidation, Not Crystal Water, Is the Key Factor.

Supercontinuum is an important light-source for spectroscopy and fundamental science. However, on-chip ultraviolet supercontinuum sources have remained challenging due to absorption and dispersion of conventional photonic materials. A team at Zhejiang University demonstrated for the first time, an on-chip UV-C to mid-infrared (270–2400 nm) supercontinuum source using periodically poled lithium tantalate (PPLT) thin films, covering more than three octaves. This platform opens new avenues for broadband on-chip nonlinear photonics and spectroscopic sensing.

A research group has developed “TP-An,” a molecule that enables even low-energy, long-wavelength light to be used more effectively by solar cells and photocatalysts. The molecule can be used even at high concentrations that are difficult for traditional materials, suggesting their usefulness in technology.