Open AccessSupercontinuum-laser diffuse reflectance spectroscopy in conjunction with an extended Kubelka–Munk model—a methodology for determination of temperature-dependent quantum efficiency in highly scattering and fluorescent media
Author(s) -
Michael C. Brupbacher,
Dajie Zhang,
William M. Buchta,
Marc B. Airola,
David M. Brown,
Michael E. Thomas,
James B. Spicer
Publication year - 2019
Publication title -
applied optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 197
eISSN - 2155-3165
pISSN - 1559-128X
DOI - 10.1364/ao.58.002438
Subject(s) - supercontinuum , diffuse reflectance infrared fourier transform , diffuse reflection , materials science , optics , spectroscopy , fluorescence , laser , scattering , laser induced fluorescence , light scattering , optoelectronics , chemistry , physics , wavelength , biochemistry , photocatalysis , quantum mechanics , photonic crystal fiber , catalysis
Temperature-dependent diffuse reflectance measurements on Cr-doped α -alumina monoliths have been performed using supercontinuum-laser illumination and CO 2 -laser heating. These measurements have been interpreted using an extended Kubelka-Munk (K-M) model describing diffuse-light propagation in highly scattering and fluorescent media to assess the temperature dependence of fluorescence quantum efficiency. Analysis of experimental results has provided a qualitative understanding of the temperature-dependent conditions for model applicability and also suggests methods for using supercontinuum-laser diffuse reflectance spectroscopy for detection of unknown fluorescent dopants.