Photosensitive composition for volume hologram recording and photosensitive medium for volume hologram recording

A photosensitive medium for volume hologram recording, wherein a volume hologram recording material layer comprising a hydrolyzed polycondensate of an organic-inorganic hybrid polymer obtainable by copolymerizing at least an organometallic compound represented by the following general formula 1 and a monomer having an ethylenically unsaturated bonding and/or its hydrolyzed polycondensate and an organometallic compound represented by the following general formula 2, a photopolymerization reactive compound, and a photopolymerization initiator is provided on a substrate:

• R1mM1(OR2)n General formula 1:
• wherein M1 represents a metallic atom, R1 may be identical or different and represents a group having an ethylenically unsaturated bonding and containing 1-10 carbon atoms, R2 may be identical or different and is alkyl group containing 1-10 carbon atoms, m+n represents the number of valence of metal M1, m≧1 and n≧1,
• M2R3n′ General formula 2:
• wherein M2 represents a metallic atom, R1 may be identical or different and is a halogen, an alkyl group, an alkoxyl group or an acyloxy group containing 10 carbon atoms or less respectively or a hydroxyl group, all or portion of these groups may be replaced with chelate ligand, and n′ represents the number of valence of metal M2.

A photosensitive composition for volume hologram recording comprising an organic-inorganic hybrid polymer which is obtainable by copolymerizing at least an organic silicon compound represented by the following general formula 3 and a monomer having an ethylenically unsaturated bonding and/or a hydrolyzed polycondensate of said organic-inorganic hybrid polymer, an organometallic particle which has a photopolymerization reactive group and is capable of exhibiting a refractive index different from that of hydrolyzed polycondensate of said organic-inorganic hybrid polymer when said organometallic particle is in a form of a polymer and a photopolymerization initiator:

• R4mSi(OR5)n General formula 3:
• wherein R4 may be identical or different and is a group having an ethylenically unsaturated bonding and containing 1-10 carbon atoms, R5 may be identical or different and is an alkyl group containing 1-10 carbon atoms, m+n=4, m≧1 and n≧1;
• and
• wherein the organometallic particle contains one or more metals selected from the group consisting of Ti, Zr, Zn, In and Sn.

A photosensitive medium for volume hologram recording, wherein a volume hologram recording material layer comprising a hydrolyzed polycondensate of an organic-inorganic hybrid polymer obtainable by copolymerizing at least an organic silicon compound represented by the following general formula 3 and a monomer having an ethylenically unsaturated bonding, and an organometallic particle which has a photopolymerization reactive group and is capable of exhibiting a refractive index different from that of hydrolyzed polycondensate of said organic-inorganic hybrid polymer when said organometallic particle is in a form of a polymer and a photopolymerization initiator is provided on a substrate:

• R4mSi(OR5)n General formula 3:
• wherein R4 may be identical or different and is a group having an ethylenically unsaturated bonding and containing 1-10 carbon atoms, R5 may be identical or different and is an alkyl group containing 1-10 carbon atoms, m+n4, m≧1 and n≧1;
• and
• wherein the organometallic particle contains one or more metals selected from the group consisting of Ti, Zr, Zn, In and Sn.