Abstract
A novel two-dimensional near-field optical system has been studied to realize more effective and simple optical disk of the high memory capacity and fast data transfer rate. This parallel optical memoryis based on a multi-beam recording/reading head and a small spot size using the vertical cavity surface emitting laser (VCSEL) microprobe array as an evanescent light source. In this research, we have simulated the optical efficiency and spot size of near-field optical heads using the FDTD method and understood the best structuraldesign of pyramidal microprobes having an asymmetric metal coating. The microprobe array head has been also realized using the micro-fabrication processes of Si and GaP wafer with a newly developed apertureformation technique. The research will continue to complete the parallel near-field optical disk of 1000Gbit/in2 data capacity and 10 Gbps transfer rate with the integration of the VCSEL array and microprobe array having high optical efficiency.
