The scattering of light by obliquely illuminated circular dielectric cylinders was previously demonstrated to be enhanced by a merger of Airy caustics at a critical tilt angle. [Appl. Opt. <b>37</b>, 1534 (1998)]. A related enhancement is demonstrated here for backward and near-backward scattering for cylinders cut with a flat end perpendicular to the cylinder’s axis. It is expected that merged caustics will enhance the backscattering by clouds of randomly oriented circular cylinders that have appropriately flat ends.
© 2003 Optical Society of America
(010.2940) Atmospheric and oceanic optics : Ice crystal phenomena
(060.2300) Fiber optics and optical communications : Fiber measurements
(080.1510) Geometric optics : Propagation methods
(290.1350) Scattering : Backscattering
(290.5850) Scattering : Scattering, particles
Philip L. Marston, Yibing Zhang, and David B. Thiessen, "Observation of the enhanced backscattering of light by the end of a tilted dielectric cylinder owing to the caustic merging transition," Appl. Opt. 42, 412-417 (2003)