Preparation and evaluation of In-Sb-O film to be used for multi-level multi-layer recording and super-resolution readout

2015 Fiscal Year Final Research Report

• Project/Area Number: 25390106
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Shima Takayuki 国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 主任研究員 (10371048)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 光記録 / 酸化物 / 情報アーカイブ

Outline of Final Research Achievements

We have studied on a combination of multi-layer recording and super-resolution readout of an optical disk. In-Sb-O was selected for the purpose since InSb is a well-known material for the super-resolution readout. By making an oxide of In-Sb, it was possible to make the film nearly transparent, and the multi-layer stacking became possible. When In-Sb-O film is sandwiched by ZnS-SiO2 films, the total film thickness increased when heated, and it is thus possible to do the optical recording. After annealing at 900 °C, the In-Sb-O film showed a reversible optical-property change between the temperatures of room temperature and 600 °C. This change is probably related to the bandgap shift of the material, and it may be the origin of super-resolution readout.

Free Research Field

光記録、光センサ