We experimentally study the propagation of circularly polarized light in the subdiffusion regime by exploiting enhanced backscattering [(EBS), also known as coherent backscattering] of light under low spatial coherence illumination. We demonstrate for the first time, to the best of our knowledge, that a circular polarization memory effect exists in EBS over a large range of scatterers’ sizes in this regime. We show that low-coherence EBS signals from the helicity preserving and orthogonal helicity channels cross over as the mean free path length of light in media varies, and that the cross point indicates the transition from multiple to double scattering in EBS.
© 2006 Optical Society of America
Original Manuscript: April 10, 2006
Revised Manuscript: June 24, 2006
Manuscript Accepted: July 3, 2006
Published: August 25, 2006
Young L. Kim, Prabhakar Pradhan, Min H. Kim, and Vadim Backman, "Circular polarization memory effect in low-coherence enhanced backscattering of light," Opt. Lett. 31, 2744-2746 (2006)