Super-resolution optical data storage based on dual-beam writing and dual-beam reading

Along with the rapid development of information technology such as cloud computing, Internet of Things and artificial intelligence etc., huge amount of data is growing at an explosive rate. Conventional optical storage technics are promising candidates for massive data storage. However, they have limited storage capacities because the recording spot cannot be minimized under the diffraction limit. Here, we demonstrate nanoscale optical memory based on a photoresist film. And our nanoscale optical memory has the potential to hold as much data as a large petabyte-level HDD library.