Apparatus and method for displaying holographic three-dimensional image

An apparatus for displaying a holographic three-dimensional image, the apparatus comprising:

• a holographic pattern generation unit which generates holographic pattern information;
• a spatial optical modulation device comprising a phase transition layer formed of a phase transition material, wherein a phase of the phase transition material changes according to a temperature thereof;
• a heat source which applies heat to the phase transition layer;
• a control unit which controls the heat source according to the holographic pattern information;
• a reproduction light source which irradiates light onto the spatial optical modulation device;
• and
• an optical absorption layer formed between a first substrate and the phase transition layer, wherein a plurality of metal nanostructures are dispersed throughout the optical absorption layer,
• wherein each of the metal nanostructures has a shape of one of a nanorod and a nanowire,
• wherein a length of each of the metal nanostructures is the same as a thickness of the optical absorption layer, and
• wherein each of the metal nanostructures is arranged in a direction oriented from the first substrate to the phase transition layer.