Year: 2025
Type: article
Abstract: ), separated by an inert intermediate shell. This rationally designed architecture enables green, red, and blue light emissions by modulating the excitation power density, leveraging the photon-order-dependent upconversion process. As the power density of the 980 nm continuous-wave (CW) laser increases, the emission color shifts systematically from green to red and ultimately to blue, corresponding to the involvement of 2-photon, 3-photon, and 4-photon processes, respectively. Chromaticity coordinate shifts on the CIE diagram validated this dynamic color modulation, demonstrating precise control over emission pathways. The findings offer a simplified yet highly versatile excitation setup for full RGB tunability, paving the way for advancements in photonics and enabling possibilities in high-resolution color display and biomedical applications.
Source: Materials Horizons
DOI: 10.1039/d5mh01409c
Authors: Raheel Ahmed Janjua, Li Xu, Xinyu Wang, Joan J. Carvajal, Ruili Zhang, Lu Liu, Sailing He
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4415952656