| Literature DB >> 31684560 |
Sanaz Sadegh, Mu-Han Yang, Christopher G L Ferri, Martin Thunemann, Payam A Saisan, Zhe Wei, Erik A Rodriguez, Stephen R Adams, Kivilcim Kiliç, David A Boas, Sava Sakadžić, Anna Devor, Yeshaiahu Fainman.
Abstract
Non-degenerate two-photon excitation (ND-TPE) has been explored in two-photon excitation microscopy. However, a systematic study of the efficiency of ND-TPE to guide the selection of fluorophore excitation wavelengths is missing. We measured the relative non-degenerate two-photon absorption cross-section (ND-TPACS) of several commonly used fluorophores (two fluorescent proteins and three small-molecule dyes) and generated 2-dimensional ND-TPACS spectra. We observed that the shape of a ND-TPACS spectrum follows that of the corresponding degenerate two-photon absorption cross-section (D-TPACS) spectrum, but is higher in magnitude. We found that the observed enhancements are higher than theoretical predictions.Year: 2019 PMID: 31684560 PMCID: PMC6825618 DOI: 10.1364/OE.27.028022
Source DB: PubMed Journal: Opt Express ISSN: 1094-4087 Impact factor: 3.894