Characterising nanoparticle anisotropy through angularly resolved Rayleigh scattering in optically levitated particles

Markus Rademacher; J. M. H. Gosling; A. Pontin; M. Toroš; J. T. Mulder; A. J. Houtepen; P. F. Barker

doi:10.1117/12.3001615

13 March 2024 Characterising nanoparticle anisotropy through angularly resolved Rayleigh scattering in optically levitated particles

Markus Rademacher, J. M. H. Gosling, A. Pontin, M. Toroš, J. T. Mulder, A. J. Houtepen, P. F. Barker

Author Affiliations +

Proceedings Volume PC12901, Complex Light and Optical Forces XVIII; PC1290102 (2024) https://doi.org/10.1117/12.3001615
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We present a novel method for characterising nanoparticles through analysis of their light scattering. We examine the resultant angularly resolved Rayleigh scattering patterns by aligning and orienting single optically levitated nanoparticles in a vacuum with trapping light. We compare our experimental findings with simulations of the Rayleigh scattered field, which allow us to determine in-situ the morphology of individual nanoparticles. While primarily utilized in low-damping environments, this method can also be applied in traditional overdamped fluids, paving the way for precision measurements of single isolated nanoparticles.

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Markus Rademacher, J. M. H. Gosling, A. Pontin, M. Toroš, J. T. Mulder, A. J. Houtepen, and P. F. Barker "Characterising nanoparticle anisotropy through angularly resolved Rayleigh scattering in optically levitated particles", Proc. SPIE PC12901, Complex Light and Optical Forces XVIII, PC1290102 (13 March 2024); https://doi.org/10.1117/12.3001615

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