Cured product, curable resin composition, optical member, lens, diffractive optical element, multilayer diffractive optical element, and compound

A curable resin composition comprising:

• a compound represented by General Formula (1);
• a polymer having a constitutional unit represented by General Formula (P) and having an acidic group at one terminal, and
• indium tin oxide particles,
• Pol1-Spa-L1-Ar-L2-Spb-Pol2 Genera Formula (1)
• in the formula, Ar represents an aromatic ring group represented by any of General Formula (2-1), (2-2), (2-3), or (2-4), L1 and L2 represent —O—, Spa represents a linking group having a shortest atom number of 11 or more and linking Pol1 and L1, and Spb represents a linking group having a shortest atom number of 11 or more and linking Pol2 and L2, Pol1 and Pol2 represent a polymerizable group, and a linking portion of Spa to L1 and a linking portion of Spb to L2 are both —CH2—, and a linking portion of Spa to Pol1 and a linking portion of Spb to Pol2 are both a carbon atom, and both Spa and Spb have no ring structure,
• in the formula, Q1 represents —S—, —O—, or >NR11, and R11 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• Y1 represents an alkyl group having 1 to 6 carbon atoms, an aromatic hydrocarbon group having 6 to 12 carbon atoms, or an aromatic heterocyclic group having 3 to 12 carbon atoms,
• Z1, Z2, and Z3 each independently represent a hydrogen atom, an aliphatic hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alicyclic hydrocarbon group having 3 to 20 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms, a halogen atom, a cyano group, a nitro group, —NR12R13, or —SR12, Z1 and Z2 may be bonded to each other to form an aromatic hydrocarbon ring or an aromatic heterocyclic ring, R12 and R13 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• A1 and A2 each independently represent a group selected from —O—, >NR21, —S—, and >C(═O), and R21 represents a hydrogen atom or a substituent,
• X represents ═O, ═S, a carbon atom to which a hydrogen atom or a substituent is bonded, or a nitrogen atom to which a hydrogen atom or a substituent is bonded,
• Ax represents an organic group having 1 to 30 carbon atoms, which has at least one aromatic ring selected from an aromatic hydrocarbon ring or an aromatic heterocyclic ring, Ay represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an organic group having 1 to 30 carbon atoms, which has at least one aromatic ring selected from an aromatic hydrocarbon ring or an aromatic heterocyclic ring, Ax and Ay may be bonded to each other to form a ring,
• Q2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and
• * represents a bonding position with L1 or L2,
• in the formula, LP represents a single bond or a divalent linking group, ArP represents a phenyl group, RP1 represents a hydrogen atom or a methyl group, ArP does not include the acidic group, and * represents a bonding portion.