Bernard J. Mason

TL;DR: These are the first measurements of hygroscopicity on fine mode and near-accumulation mode aerosols, the size regimes bearing the most atmospheric relevance in terms of loading, light extinction and scattering, and are contrasted with other single particle and ensemble methods.

TL;DR: The first single-particle Qext measurements for accumulation mode aerosol are presented for droplets with radii as small as ∼300 nm, and the refractive indices determined are larger than at the longer wavelength consistent with the expected dispersion behaviour.

TL;DR: The ability of two techniques, aerosol cavity ring down spectroscopy (A-CRDS) and optical tweezers, to retrieve the refractive index of atmospherically relevant aerosol was compared through analysis of supersaturated sodium nitrate at a range of relative humidities.

TL;DR: In this paper, the equilibrium position of an aerosol droplet trapped in a counter-propagating Bessel beam and gas flow is studied both experimentally and theoretically, and it is shown that the position of the droplet is greatly affected by the excitation of whispering gallery modes.

TL;DR: It is demonstrated that the scatter in the retrieved extinction efficiency of a single particle is determined by its lateral motion, which spans a few wavelengths of the intracavity standing wave used for CRDS measurements.