Opt Lett. 2011 Oct 15;36(20):4080-2. doi: 10.1364/OL.36.004080.
Optics letters
V B Il'in, V G Farafonov
PMID: 22002392 DOI: 10.1364/OL.36.004080
The Rayleigh approximation is known to be designed only for small ellipsoidal scatterers. We suggest an approach that allows one to find a simple, often analytical, long-wavelength approximation for nonellipsoidal particles. We apply the approach to axisymmetric scatterers and utilize Chebyshev particles to study the main properties of the obtained approximation. To a certain degree, it can be considered as an extension of the Rayleigh approximation to nonspheroidal scatterers.