ABSTRACT
Nano-optical data recording and readout are very important in meeting the demand for large-capacity and high-density information storage. However, obtaining nanometric optical information marks by the traditional optical method is difficult due to diffraction limit restrictions. Nonlinear super-resolution nano-optical data storage is a good technique and has undergone considerable development in the past two decades; advances include the ability to break through the optical diffraction limit as well as the capability to realize the recording and readout of below-diffraction-limited information marks.In this chapter, we introduce the basic principle of nonlinear super-resolution nano-optical data storage, including the optical response of the nonlinear materials, the formation of super-resolution optical spot, and the recording and readout of nanoscale data mark on the storage devices.
