Morozov Y. Methods and tools of ultra high-density and long-term optical information recording

The thesis is devoted to the problem of increasing of the optical media recording density and the reliability of long-term information storage based at the sapphire disc. The use of near-field probe based on optical plasmon microstrip lines (NPOPML) in the near-field optical recording media is proposed and expediency of such approach is justified. The spatial model of highly efficient excitation of the NPOPML was proposed and was shown that the excitation efficiency is 68%. The mathematical model of near-field information recording with NPOPML was developed. On its basis the process of recording/playback from media such as ROM and RW in the illumination, illumination-reflection and illumination-collection modes of NPOPML was investigated. The use of proposed system allows one to reach the recording density of information of 0.3 GB/mm2. This gives the ability to create optical media with storage capacity of 3.5 TB. The method of precision detecting of the readout signal from the optical media and distance control between NPOPML and the optical media during information recording/playback was developed. The method of astigmatic and spherical aberrations compensation in sapphire optical disc for the long-term data storage was developed. Experimental results confirmed the possibility of data reproducing from sapphire disc by using developed method of aberrations compensation. This allows realizing the potential of the sapphire disc in the long-term data storage development area.