Photorefractive composite, spatial light modulator, and hologram display device using the same

A spatial light modulator (SLM), comprising:

• a first electrode;
• a second electrode corresponding to the first electrode;
• and
• a photorefractive layer between the first and second electrodes, wherein the photorefractive layer includes a photoconductive polymer, a nonlinear optical chromophore, and at least one carborane compound expressed as the following Chemical Formulae 2A through 2C
• wherein the photorefractive layer exhibits photoconductivity and optical nonlinearity.

A photorefractive composite, comprising:

• at least one carborane compound expressed as the following Chemical Formulae 2F, 2J and 2L
• where, Z1 and Z2 are, independently from each other, one selected from hydrogen atoms deuterium atoms, halogen atoms, substituted or non-substituted C1-C20 alkyl groups, substituted or non-substituted C2-C20 alkenyl groups, substituted or non-substituted C2-C20 alkynyl groups, substituted or non-substituted substituted C1-C20 alkoxy groups, substituted or non-substituted C3-C20 cycloalkyl groups, substituted or non-substituted C3-C20 cycloalkenyl groups, substituted or non-substituted C5-C20 aryl groups, substituted or non-substituted C2-C20 heteroaryl groups, substituted or non-substituted C5-C20 aryloxy group, and substituted or non-substituted C5-C20 arylthio groups,
• Z1 and Z2 are the same or different,
• p and q are integers of 1 through 5, and
• n is an integer of 0 through 10;
• a photoconductive polymer, and
• a nonlinear optical chromophore,
• wherein the photorefractive composite exhibits photoconductivity and optical nonlinearity.