Patent ID: 7011925
Filing Date: 2006-03-14
Classification: B82Y,G11B,Y10S

Abstract:
1. A three-dimensional memory apparatus for storing information in and retrieving information from a three-dimensional volume, comprising an active medium, which is capable of changing from a first to a second isomeric form as a response to radiation of a light beam having an energy substantially equal to a first threshold energy, wherein the concentration ratio between a first and a second isomeric form in any given volume portion represents a data unit; means for exposing said active medium to said light beam to induce a multiphoton absorption; said memory apparatus being characterized in that said active medium comprises a diarylalkene derivative of the general formula Ar wherein Ar R wherein said active medium is embedded in a three-dimensional supporting matrix; and further comprising means for reading a data unit stored within said given volume portion of said active medium embedded in said three-dimensional supporting matrix by measuring said concentration ratio between said first and second isomeric forms.