We have developed a new optical storage system that uses minute spheres arranged upon a surface-relief grating. By using dye-doped minute spheres as recording bits we can limit a sensitive region within a sphere's diameter. Using a reflection-type confocal optical system, we read out shape signals from minute spheres at high resolution. The shape signals from minute spheres are utilized as clock signals in recording and readout.
© 2005 Optical Society of America
Naoki Kobayashi and Chikara Egami, "High-resolution optical storage by use of minute spheres," Opt. Lett. 30, 299-301 (2005)