Absolute fluorescence and absorption measurements over a dynamic range of 106 with cavity-enhanced laser-induced fluorescence

Scott E. Sanders, Oliver R. Willis, Nils Hendrik Nahler, Eckart Wrede

Research output: Contribution to journalArticle

Abstract

We present a novel spectroscopic technique that exhibits high sensitivity and a large dynamic range for the measurement of absolute absorption coefficients.We perform a simultaneous and correlated laser- induced fluorescence and cavity ring-down measurement of the same sample in a single pulsed laser beam. The combined measurement offers a large dynamic range and a lower limit of detection than either technique on its own. The methodology, dubbed cavity-enhanced laser-induced fluorescence, is developed and rigorously tested against the electronic spectroscopy of 1,4-bis(phenylethynyl)benzene in a molecular beam and density measurements in a cell. We outline how the method can be used to determine absolute quantities, such as sample densities, absorption cross sections, and fluores- cence quantum yields, particularly in spatially confined samples.
LanguageEnglish
Pages014201
JournalJournal of Chemical Physics
Volume149
Issue number1
Early online date2 Jul 2018
DOIs
StatePublished - 7 Jul 2018

Fingerprint

laser induced fluorescence
dynamic range
fluorescence
cavities
absorption cross sections
molecular beams
pulsed lasers
absorptivity
benzene
laser beams
methodology
sensitivity
rings
cells
electronics
spectroscopy

Keywords

  • cavity ring-down spectroscopy
  • Laser-induced fluorescence
  • fluorescence quantum yield
  • molecular spectroscopy

Cite this

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abstract = "We present a novel spectroscopic technique that exhibits high sensitivity and a large dynamic range for the measurement of absolute absorption coefficients.We perform a simultaneous and correlated laser- induced fluorescence and cavity ring-down measurement of the same sample in a single pulsed laser beam. The combined measurement offers a large dynamic range and a lower limit of detection than either technique on its own. The methodology, dubbed cavity-enhanced laser-induced fluorescence, is developed and rigorously tested against the electronic spectroscopy of 1,4-bis(phenylethynyl)benzene in a molecular beam and density measurements in a cell. We outline how the method can be used to determine absolute quantities, such as sample densities, absorption cross sections, and fluores- cence quantum yields, particularly in spatially confined samples.",
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Absolute fluorescence and absorption measurements over a dynamic range of 106 with cavity-enhanced laser-induced fluorescence. / Sanders, Scott E.; Willis, Oliver R.; Nahler, Nils Hendrik; Wrede, Eckart.

In: Journal of Chemical Physics, Vol. 149, No. 1, 07.07.2018, p. 014201.

Research output: Contribution to journalArticle

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AU - Sanders,Scott E.

AU - Willis,Oliver R.

AU - Nahler,Nils Hendrik

AU - Wrede,Eckart

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AB - We present a novel spectroscopic technique that exhibits high sensitivity and a large dynamic range for the measurement of absolute absorption coefficients.We perform a simultaneous and correlated laser- induced fluorescence and cavity ring-down measurement of the same sample in a single pulsed laser beam. The combined measurement offers a large dynamic range and a lower limit of detection than either technique on its own. The methodology, dubbed cavity-enhanced laser-induced fluorescence, is developed and rigorously tested against the electronic spectroscopy of 1,4-bis(phenylethynyl)benzene in a molecular beam and density measurements in a cell. We outline how the method can be used to determine absolute quantities, such as sample densities, absorption cross sections, and fluores- cence quantum yields, particularly in spatially confined samples.

KW - cavity ring-down spectroscopy

KW - Laser-induced fluorescence

KW - fluorescence quantum yield

KW - molecular spectroscopy

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