METHODS FOR ACTIVATION CONTROL OF PHOTOPOLYMERIZATION FOR HOLOGRAPHIC DATA STORAGE USING AT LEAST TWO WAVELENGTHS

摘要

A polymerizable media includes a holographic recording media. The media includes at least one monomer or oligomer that undergoes polymerization; a compound, which absorbs actinic radiation of a first wavelength and forms a sensitizer which absorbs actinic radiation of a second wavelength; and an initiator, which, in combination with the sensitizer, initiates polymerization of the at least one monomer or oligomer when said sensitizer is exposed to actinic radiation of the second wavelength.