Today, large amounts of information are still stored on all kinds of disks, but there is already a truly gigantic unused storage that has yet to be mastered. We are talking about holographic storage devices.
A team of Chinese scientists has developed a nanoparticle-based film capable of storing information in the form of 3D holograms, which improve data density, read speed, write speed and stability in harsh environments.
The idea of holographic data storage has existed for several decades, but there has been no tangible progress in this direction. In 2005, several major technology companies joined forces to promote the idea of universal holographic discs (HVDs) as well as holographic cards.
The most significant successes were achieved by scientists from Northwestern University of China, who created a new type of carrier. In the first step, they developed a semiconductor film made from titanium dioxide (TiO2) and silver nanoparticles. Information is recorded on it using a laser by changing the charge, and since different laser wavelengths affect particles in different ways, the information is "stored" in the form of three-dimensional holograms.
This technology allows devices to store more information in less physical space than conventional optical systems. According to the university team, a piece of holographic film measuring 10 x 10 cm and a thickness of 620 nanometers will store 1000 times more data than a DVD, that is, approximately 8.5 TB.