Work

Direct determination of multiphoton absorption cross-sections by transient absorption spectroscopy

Year: 2025

Type: article

Abstract: perovskite nanocrystals and CdSe/ZnS quantum dots under 1700 nm and 2100 nm excitation. These values exceed those of incumbent materials used for mouse deep-brain imaging by at least an order of magnitude. Our method does not rely on photoluminescence signals, making it suitable for weakly or non-emissive materials. Importantly, our work provides a powerful generalizable tool to accelerate the discovery and optimization of next generation photon-harvesting materials.

Source: Chemical Science

DOI: 10.1039/d5sc03392f

Authors: Huajun He, Jia Wei Melvin Lim, Minjun Feng, Zengshan Xing, Tze Chien Sum

Institution: Nanyang Technological University

Language: English

Topic: Nonlinear Optical Materials Studies

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: National Research Foundation, National Research Foundation Singapore, Ministry of Education - Singapore, Ministry of Education, India

Awards: G3392974547, G4858512548, G8058454333