Hologram-recording material, hologram-recording medium, and hologram-recording method

A hologram-recording medium, comprising:

• a recording layer that comprises:
• a hologram-recording material including a photoresponsive molecule,
• a reactive molecule having an intrinsic birefringence, and
• a photopolymerization initiator that accelerates polymerization and/or crosslinking of the reactive molecule having an intrinsic birefringence,
• a content of the photopolymerization initiator being in a range of from 0.001 wt % to less than about 0.1 wt % relative to the hologram-recording material, and being in a range of from 0.1 wt % to 5 wt % relative to the reactive molecule, and
• a content of the reactive molecule having an intrinsic birefringence being in a range of about 30 to about 80 wt % relative to the hologram-recording material.

A hologram-recording method, comprising:

• performing multiplex recording of information by using at least one of light intensity modulation or polarized light modulation during recording of the information by simultaneous irradiation of signal and reference beams on a hologram-recording medium that includes:
• a recording layer that is a hologram-recording material containing:
• a photoresponsive molecule,
• a reactive molecule having an intrinsic birefringence, and
• a photopolymerization initiator that accelerates polymerization and/or crosslinking of the reactive molecule having an intrinsic birefringence,
• a content of the photopolymerization initiator being in a range of from 0.001 wt % to less than about 0.1 wt % relative to the reactive hologram-recording material, and being in a range of from 0.1 wt % to 5 wt % relative to the reactive molecule, and
• a content of the reactive molecule having an intrinsic birefringence being in a range of about 30 to about 80 wt % relative to the hologram-recording material.