Abstract

In the field of optical disks, higher recording density beyond the wavelength limit is desired. Super-resolution techniques have been studied to circumvent the wavelength limit not only in magneto-optical disks but also for ROM disks using a phase change material [1] or photoreactive organic materials [2][3]. Those methods, however, have some drawbacks: 1) readout cyclability is limited, 2) they are applicable only to ROM disks, because writing and reading many times damages the masking layer.

© 1998 Optical Society of America