Analysis of Light-beam Scattering from DWDD Disk with Control Layer under Considering Rear Process

摘要

Scattering characteristics of a domain wall displacement detection (DWDD) disk were investigated. DWDD is one of the high-density storage technologies of magneto-optical (MO) disks. A DWDD structure with a control layer was assumed and rear process was considered. A control layer is used to suppress ghost signal due to rear process. We studied how the rear process affect the characteristics of the main-polarized and crosspolarized components of the scattered light beam through numerical simulations based on finite-difference time-domain (FDTD) method.