The total amount of data generated worldwide is
expected to reach 175 zettabytes (1 ZB equals 1 billion terabytes)
by 2025. If 175 ZB were stored on Blu-ray disks, the stack would be
23 times the distance to the moon. There is an urgent need to
develop storage technologies that can accommodate this enormous
amount of data.
Sub-diffraction optical writing enables data storage at the
nanoscale

