Dielectric based metasurface hologram device and manufacturing method of same and display device having same

A dielectric based metasurface hologram device comprising:

• a substrate layer provided at a lowermost portion of the dielectric based metasurface hologram device;
• and
• a dielectric layer forming a geometric metasurface on the substrate layer,
• wherein the substrate layer includes a plurality of unit cells which are continuous, and the dielectric layer includes a plurality of nano-structures which are disposed with a predetermined distance therebetween,
• wherein a single nano-structure is disposed on the unit cell,
• wherein a hologram image is formed when an incident light from a light source is reflected by the nano-structure so that a phase of the incident light is controlled, and
• wherein the hologram device realizes a hologram of a predetermined pattern,
• wherein the nano-structures are disposed such that a phase difference between the incident light on the nano-structure and a light reflected by the nano-structure by a portion of the nano-structures corresponding to the pattern becomes 1/2π and a phase difference between the incident light on the nano-structure and a light reflected by a portion of the nano-structures of a background not corresponding to the pattern becomes zero, and
• wherein the incident light on the nano-structure and the light reflected by the nano-structure interfere with each other, by which a contrast ratio between the portion corresponding to the pattern and the background is generated.