Three-Dimensional (FD)^2TD Analysis of Light-Beam Diffraction from Phase-Change Optical Disks with Land/Groove Recording Structures
- Resource Type
- Journal Article
- Authors
- Hisashi HOTTA; Takashi ASAI; Toshitaka KOJIMA; Yiwei He
- Source
- ITE Technical Report. 2002, :67
- Subject
- (FD)^2TD method
(FD)^2TD法
crosstalk
groove recording
land
meta reflective layer
phase-change optica disk
クロストーク
ランド・グループ記録
相変化光ディスク
金属反射膜
- Language
- English
- ISSN
- 1342-6893
2424-1970
The present paper deals with the ferquency-dependent finite difference time domain ((FD)^2TD) method analysis of the light-beam diffraction from a land/groove recording phase-change (PC) optical disk model with metal (Al or Au) reflective layer in order to improve the conventional analysis for PC optical disk models under the assumption of perfectly conducting reflective layer (PCRL). The diffracted fields are numerically calculated for both recorded and non-recorded states of the recording layer, and the comparison of the diffraction characteristics between two states is discussed. The crosstalk between the recording marks on lands and grooves are evaluated and the optimum groove depth is examined.