Patent ID: 6811728
Filing Date: 2004-11-02
Classification: G03H,G11B

Abstract:
A method of manufacturing a multi-layered holographic read-only memory, said method comprising:providing a plurality of single-mode thin-film slab waveguides each having a core layer and a clad layer; producing a periodic scattering center in at least one of the slab waveguides by modulating the thickness of the core layer by impressing a concave-convex pattern, which is formed on a master plate, to one of the core layer and the clad layer, wherein the periodic scattering center functions as a hologram pattern by which scattered light passing through the slab waveguide generates a pattern of diffracted light outside the slab waveguide; and stacking single-mode thin-film slab waveguides to achieve a multi-layered stack of said slab waveguides.