Volumetric optical integrated circuits

Patent metadata

Field	Value
Publication number	US-11237343-B2
Application number	US-201916706173-A
Country	US
Kind code	B2
Filing date	Dec 6, 2019
Priority date	Dec 7, 2018
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A device includes an optic in an at least partially rigid scaffold. The scaffold is permeated, at least temporarily during a writing process, by writable media. The optic may be written into a writable volume in the scaffold defined by the writable media. The optic may be written by exposing the writable media to incident light to cause a material property change in the writable media within the writable volume.

First claim

What is claimed is:

1. A device comprising:
a porous medium comprising a writable volume, the writable volume defined via a writable medium that at least temporarily permeated pores of the porous medium; and
a voxel formed within the writable volume via optical absorption by the writable medium.

2. The device of claim 1 , where the writable medium includes a monomer, polymer, a photoresist, or any combination thereof.

3. The device of claim 2 , where the photoresist includes pentaerythritol triacrylate.

4. The device of claim 2 , where the monomer includes a self-assembled-monolayer-forming group.

5. The device of claim 2 , where the voxel includes a polymer after polymerizing the monomer as a result of the optical absorption.

6. The device of claim 1 , where the optical absorption includes multi-photon absorption.

7. The device of claim 1 , where a voxel volume of the voxel includes a focal volume of a focused incident light source.

8. The device of claim 1 , where the porous medium comprises a porous silicon.

9. The device of claim 1 , where the porous medium is a porous silicon that has been at least partially oxidized.

10. A method of manufacture including:
generating a porous medium with a writable volume by porosifying at least a portion of a substrate; and
in the writable volume within the porous medium that at least temporarily permeated pores of the porous medium, generating a voxel by:
focusing incident light into the writable volume to cause a material property change within a writable medium through optical absorption; and
while causing the material property change, fixing a position of the voxel within the porous mediums.

11. The method of claim 10 , further including selecting a level of the material property change by selecting an intensity or exposure duration of the incident light.

12. The method of claim 11 , where selecting the intensity includes selecting a power level of a light source of the incident light.

13. The method of claim 11 , where selecting the intensity of the incident light includes selecting a focal volume of the incident light.

14. The method of claim 10 , a light source of the incident light includes a laser, a light emitting diode, a lamp, a flash lamp, an image projector, or any combination thereof.

15. The method of claim 10 , further including generating multiple voxels to define an optic within the porous medium.

16. The method of claim 15 , where the optic includes a waveguide configured to connect a guided mode from a fiber to a port on an optical chip.

17. The method of claim 16 , where the waveguide is one of multiple waveguides within the porous medium.

18. The method of claim 16 , where the fiber includes a multi-channel fiber.

19. A method including:
generating a porous medium including a writable volume by porosifying at least a portion of a substrate;
focusing incident light into the porous medium including the writable volume, the writable volume defined via a writable medium that at least temporarily permeates pores of the porous medium; and
writing, via optical absorption of the incident light, a voxel in the writable medium within the writable volume in the porous medium.

20. The method of claim 19 , where:
writable medium includes a monomer; and
the voxel includes a polymer formed after polymerizing the monomer as a result of the optical absorption.

Assignees

• Univ Illinois

Inventors

• Goddard Lynford L
• Toussaint Kimani C
• Braun Paul V
• Zhu Jinlong
• Bacon-Brown Daniel
• Ocier Christian H
• Ding Qing
• Richards Corey

Classifications

• C08F2/48

  by ultraviolet or visible light · CPC title

• G02B6/4212 Primary

  the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel · CPC title

• G02B2006/1219

  Polymerisation · CPC title

• G02B6/12

  of the integrated circuit kind (electric integrated circuits H10B, H10D84/00 - H10D89/00, H10F19/00, H10F39/00, H10H29/00, H10K19/00, H10K39/00, H10K59/00, H10N19/00, H10N39/00, H10N59/00, H10N69/00, H10N79/00, H10N89/00) · CPC title

• G02B6/138 Primary

  by using polymerisation · CPC title