Article

Singlet-states-mediated highly efficient two-photon fluorescence in organic dyes

2026-06-11

Abstract excerpt

This study reports a brand-new continuous-wave-excited (CW-excited) two-photon fluorescence emission mechanism in indocyanine green (ICG), an organic fluorescent dye widely used in clinical practice. This mechanism is based on the excited state absorption (ESA) process of the first singlet excited state. Intramolecular electrons sequentially absorb two photons to reach a high-energy singlet excited state, followed...

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Literature Corpus work: 11bdd0d5-1319-5cfb-a4dd-4daffaa0177c
DOI: 10.64898/2026.06.04.729720

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