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.
© 2011 Optical Society of America
Original Manuscript: June 30, 2011
Revised Manuscript: September 20, 2011
Manuscript Accepted: September 20, 2011
Published: October 13, 2011
V. B. Il’in and V. G. Farafonov, "Rayleigh approximation for axisymmetric scatterers," Opt. Lett. 36, 4080-4082 (2011)