近接場光学応用テラバイト光ディスクの基礎研究(I) : 超微細光ビーム用光源の研究

概要

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Making technology over the output facet of a laser diode with a gold evaporated film and a phase matching film on the DBR mirrors of a VCSEL is very important to get higher efficient throughput. In order to make the near field pattern smaller for a laser diode output and to make a nano-meter diameter hole on the center of the gold film to obtain written bits by evanescent waves of several tens nano meter, two methods are now being developed in our project. One is the development of an appropriate phase matching film thickness and gold film thickness.The other new method to get higher throughput, which is now under development in our project, is to combine the total reflection prism technology and a super fine coaxial cable technology. This is fabrication technology of a special fine probe tip on the output facet of the laser diode. A Giant Magnetic Resistive (GMR) Array Head is also begin to be designed to detect both fine tracks on the disk and to detect a Magneto-Optical signal from the disk.
東海大学の論文
2000-03-10