Conformal optical metasurfaces

Patent metadata

Field	Value
Publication number	US-9995859-B2
Application number	US-201615097101-A
Country	US
Kind code	B2
Filing date	Apr 12, 2016
Priority date	Apr 14, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

Structures for scattering light at multiple wavelengths are disclosed. Scattering elements are fabricated with different geometric dimensions and arrangements, to scatter or focus light at the the same focal distance for each wavelength, or at different focal distances according to the desired application. The scattering elements fabricated on a substrate can be peeled off with a polymer matrix and attached to a lens to modify the optical properties of the lens.

First claim

What is claimed is:

1. A method comprising:
fabricating a metasurface on a substrate, the metasurface having a plurality of scattering elements;
depositing a polymer matrix on the metasurface;
peeling off the plurality of scattering elements from the substrate, by peeling off the polymer matrix from the substrate;
attaching the plurality of scattering elements to a lens, by attaching the polymer matrix to the lens.

2. The method of claim 1 , wherein the peeling off comprises sonicating the plurality of scattering elements on the substrate.

3. The method of claim 1 , further comprising modifying an optical property of the lens by the plurality of scattering elements.

4. The method of claim 3 , wherein the optical property is a focal length of the lens.

5. The method of claim 3 , wherein the optical property is a coma aberration of the lens.

6. The method of claim 3 , wherein the polymer matrix is made of polydimethylsiloxane and the scattering elements are made of amorphous silicon.

7. The method of claim 3 , wherein the scattering elements are cylindrical posts.

8. The method of claim 1 , wherein fabricating the metasurface further comprises:
calculating a first phase profile of optical waves at a surface of the lens;
calculating a second phase profile of optical waves at the surface of the lens according to a desired functionality of the lens, the second phase profile being a desired phase profile different from the first phase profile;
calculating a third phase profile of optical waves equal to a difference between the first and second phase profiles;
calculating physical dimensions of the plurality of scattering elements at the surface of the lens necessary to obtain the third phase profile of optical waves;
fabricating the metasurface according to the calculated physical dimensions; and wherein attaching the plurality of scattering elements to the lens is to obtain a metasurface lens having the second phase profile of optical waves.

9. The method of claim 8 , wherein the calculating the first, second and third phase profiles is carried out through a ray optics approximation.

Assignees

• California Inst Of Techn

Inventors

• Kamali Seyedeh Mahsa
• Arbabi Ehsan
• Arbabi Amir
• Faraon Andrei

Classifications

• G02B5/0278

  used in transmission · CPC title

• G02B1/002 Primary

  made of materials engineered to provide properties not available in nature, e.g. metamaterials · CPC title

• G02B5/0226 Primary

  having particles on the surface · CPC title

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B5/0263

  with positional variation of the diffusing properties, e.g. gradient or patterned diffuser · CPC title