The perspectives of optical memory

• Дата: 2021
• Автори: Петров, В. В., Крючин, А. А., Беляк, Є. В., Мельник, О. Г.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут проблем реєстрації інформації НАН України 2021
• Теми: optical carriers; nanostructures; plasmons; near field; neural networks
• Онлайн доступ: http://drsp.ipri.kiev.ua/article/view/244782
• Назва журналу: Data Recording, Storage & Processing

The main problem with the limited capacity of optical media is the inability to reduce beyond the diffraction limit the diameter of the laser beam, which is used to record and read information. Due to the long storage life and low power consumption, optical media have the potential to be used in archival storage systems and including cloud storage. The use of optical media in cloud storage is limited by the insufficient capacity of optical media with traditional 2D recording. The task of overcoming the optical diffraction limit and increasing the resolution of optical recording systems, and thus increasing the capacity of optical media has been considered. To create multilayer disks, it was proposed to use two-photon light absorption (2P) to record information, on the basis of which it is possible to create a three-dimensional (3D) optical storage system. The main direction of creating optical media with ultra-dense recording in recent years has been the use of plasmon resonances in metal nanostructures The use of spectral signature of metal nanostructures can be an effective direction of research to increase the capacity of optical media. Nanomaterials with unique mechanical, electronic and optical properties make it possible to develop optical storage methods with ultra-high capacity, long data storage life and ultra-low energy consumption. Subsequent generations of optical storage systems will use metal nanoparticles, graphene and graphene oxide, semiconductor quantum dots and nanocrystals doped with rare earth elements. To overcome the limitation associated with a high level of interference in the reproduction of information recorded on ultra-dense recording media, the use of neural networks for visual pattern recognition has been proposed. The use of 3D recording with photoluminescent reading has become a promising direction for a significant increase in the capacity of optical media. Fig.: 6. Refs: 26 titles.