Studying the Optical and Thermodynamic Properties of Single Aerosol Particles using Bessel Laser Beams

MI Cotterell, AE Carruthers, BJ Mason, JS Walker, JP Reid

Isolating and studying individual atmospherically-relevant sub-micrometre aerosol particles responsible for forming cloud condensation nuclei (CCN) is challenging. Carefully engineered Bessel beams (BB’s) may be used to optically trap single aerosol particles across a range of particle sizes, down to diameters of a few hundred nanometres. This poster outlines how a single BB with a counter-propagating gas flow can be used to trap single aerosols and measure their optical and thermodynamic properties.

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