Assessing the Accuracy of Complex Refractive Index Retrievals from Single Aerosol Particle Cavity Ring-Down Spectroscopy

Cavity ring-down spectroscopy (CRDS) of single, optically manipulated aerosol particles affords quantitative retrieval of refractive indices for particles of fixed or evolving composition with high precision. We quantify the accuracy with which refractive index determinations can be made by CRDS for single particles confined within the core of a Bessel laser beam and how that accuracy is degraded as the particle size is progressively reduced from the coarse mode (> 1 micrometre radius) to the accumulation mode (< 500 nm radius) regime. We apply generalised Lorenz-Mie theory to the intra-cavity standing wave to explore the effect of particle absorption on the distribution of extinction cross section determinations resulting from stochastic particle motion in the Bessel beam trap. The analysis provides an assessment of the accuracy with which the real, n, and imaginary, κ, components of the refractive index can be determined for a single aerosol particle.

These data are published in M. I. Cotterell et al., Aerosol Science and Technology (2016)

Creator(s) Bryan Bzdek, Andrew Orr-Ewing, Rose Willoughby
Funder Natural Sciences and Engineering Research Council of Canada, Engineering and Physical Sciences Research Council, Natural Environment Research Council, Royal Society of Chemistry, Aerosol Society
Publication date 08 Aug 2016
Language eng
Publisher University of Bristol
Licence Non-Commercial Government Licence for public sector information
DOI 10.5523/bris.1a088w6wntf5210fkekhagrkfu
Complete download (zip) https://data.bris.ac.uk/datasets/1a088w6wntf5210fkekhagrkfu/1a088w6wntf5210fkekhagrkfu.zip
Citation Bryan Bzdek, Andrew Orr-Ewing, Rose Willoughby (2016): Assessing the Accuracy of Complex Refractive Index Retrievals from Single Aerosol Particle Cavity Ring-Down Spectroscopy. https://doi.org/10.5523/bris.1a088w6wntf5210fkekhagrkfu
Total size 28.4 MiB

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