We study the effective index of random media composed of two-layered spheres by using the energy-density coherent potential approximation method. As expected from the Ewald–Oseen extinction theorem, in the long-wavelength limit, the optical properties of a random medium composed of two-layered spheres are identical to those of a random medium composed of the corresponding pure spheres, while in the Mie-scattering region, the single-scattering resonances lead to an overall shift of the effective refractive index with the modified volume fraction.
© 2011 Optical Society of America
Original Manuscript: June 13, 2011
Revised Manuscript: September 18, 2011
Manuscript Accepted: September 20, 2011
Published: October 17, 2011
Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics
Hao Zhang, Pengfei Zhu, Yuchen Xu, Heyuan Zhu, and Min Xu, "Effective medium theory for random media composed of two-layered spheres," J. Opt. Soc. Am. A 28, 2292-2297 (2011)