Modal-based tomographic imaging from far-zone observations: multifrequency case

Abstract

A recently developed optical diffraction tomography technique [J. Opt. Soc. Am. A 26, 19 (2009)] is modified to handle the special case of a dispersionless scatterer, where the relative permittivity contrast of the object is independent of the operation frequency, allowing the fusion of multifrequency data. The modified technique is illustrated with a simulation scenario involving a dispersionless and lossless object being probed with plane waves of distinct incidence angles and frequencies. Superiority of the fusion of multifrequency data over the use of single-frequency data is demonstrated.