Abstract
The removable and rewritable high-density phase-change optical disk is attractive for high-definition television (HDTV), digital TV and internet downloading. Super-resolution near-field technology is one of the most promising technologies for achieving ultra-high density recording and is considered a more feasible way of near-field optical recording with simpler recording-head design, less mechanical damage, no contamination and higher recording speed. Developing new structures and searching for new mask materials are two important issues.