System for producing ultra-thin color phase hologram with metasurfaces

Patent metadata

Field	Value
Publication number	US-2016334758-A1
Application number	US-201615152535-A
Country	US
Kind code	A1
Filing date	May 11, 2016
Priority date	May 11, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A device for producing a subwavelength hologram. The device comprises a metasurface layer attached to a substrate. The metasurface layer includes an array of plasmonic antennas that simultaneously encode both wavelength and phase information of light directed through the array to produce a hologram. The wavelength is determined by the size of the antennas, and the phase is determined by the orientation of the antennas.

First claim

What is claimed is:

1 . A device for producing a subwavelength hologram, comprising:
a transparent substrate; and a metasurface layer attached to the substrate, the metasurface layer including an array of plasmonic antennas which simultaneously encode both wavelength and phase information of light directed through the array to produce a hologram.

2 . The device of claim 1 , wherein the antennas comprise openings in the metasurface layer.

3 . The device according to claim 2 , wherein the openings comprise rectangular openings.

4 . The device according to claim 2 , wherein the openings comprise elliptic openings.

5 . The device according to claim 1 , wherein the antennas are anisotropic.

6 . The device according to claim 1 , wherein the orientation of the antennas is configured to control said phase information.

7 . The device according to claim 6 , wherein the size of the antennas is configured to control said wavelength.

8 . The device according to claim 1 , wherein the antennas are grouped into a plurality of sizes, each of the sizes providing a selected wavelength, the output of the plurality of sizes of antennas being combined to produce a multi-color hologram.

9 . The device according to claim 7 , wherein the plurality of sizes comprises three sizes.

10 . The device according to claim 8 , wherein the three sizes of antennas correspond to red, green and blue light.

11 . The device according to claim 9 , wherein the output of the three sizes of antennas are combined provide a multi-color hologram.

12 . The device according to claim 1 , wherein the metasurface layer comprises metal.

13 . The device according to claim 12 , wherein the metasurface layer comprises silver.

14 . The device according to claim 12 , wherein the metasurface layer comprises gold.

15 . The device according to claim 12 , wherein the metasurface layer comprises aluminum.

16 . The device according to claim 12 , wherein the metasurface layer comprises copper.

17 . The device according to claim 1 , wherein the metasurface layer comprises ceramic.

18 . The device according to claim 17 , wherein the metasurface layer comprises titanium nitride.

19 . The device according to claim 1 , wherein the device is used for color imaging displays.

20 . The device according to claim 1 , wherein the device can store information beyond the diffraction limit of light enabled by multiple wavelengths operation.

21 . The device according to claim 1 , wherein the device is integrated within a security device.

22 . The device according to claim 1 , wherein the device is integrated within a credit card.

23 . The device according to claim 1 , wherein the device is integrated within a personal identification card.

24 . The device according to claim 1 , wherein the device is integrated within a data storage device.

Assignees

• Purdue Research Foundation

Inventors

• Shaltout Amr
• Choudhury Sajid
• Kildishev Alexander V
• Boltasseva Alexandra
• Shalaev Vladimir M

Classifications

• G03H2001/2271

  RGB holobject · CPC title

• G03H1/2286

  Particular reconstruction light (G03H1/24 takes precedence); Beam properties · CPC title

• G03H1/2249 Primary

  Holobject properties · CPC title

• G03H1/0272

  Substrate bearing the hologram · CPC title

• G03H1/0011

  for security or authentication (holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032) · CPC title