Transparent optical portion, optical device and method for manufacturing an optical device
The present disclosure pertains to a transparent optical portion comprising a plurality of protrusion for providing a metalens function on a surface of an optical device, wherein a direction of growth of the plurality of protrusion is based on a crystal structure of a first substrate, and wherein the protrusions differ in size.
1. An optical device comprising:
a transparent optical portion including a plurality of protrusions for providing a metalens function on a surface of an optical device, wherein
a direction of growth of the plurality of protrusions is based on a crystal structure of a first substrate, and wherein
the protrusions differ in size; and
circuitry for processing a photoelectric signal.
2. The optical device according to claim 1 , further comprising a second substrate including silicon, the circuitry for processing a photoelectric signal being on the second substrate.
3. The optical device according to claim 1 , further comprising a second substrate, the circuitry for processing a photoelectric signal being on the second substrate, and wherein the transparent optical portion and the second substrate are bonded onto each other.
4. The optical device according to claim 1 , wherein the first substrate includes Gallium Nitride.
5. The optical device according to claim 1 , wherein the size of a protrusion of the plurality of protrusions is based on the position of the protrusion.
6. The optical device according to claim 1 , wherein the size is at least one of diameter and height.
7. The optical device according to claim 1 , wherein the metalens function collimates light incident thereon.
8. The optical device according to claim 1 , further comprising a second substrate, the circuitry for processing a photoelectric signal being on the second substrate, wherein the metalens function directs light incident thereon to the second substrate.
9. The optical device according to claim 8 , wherein the first substrate and the second substrate are made of different materials.
10. The optical device according to claim 1 , further comprising a second substrate, the circuitry for processing a photoelectric signal being on the second substrate.
11. The optical device according to claim 1 , wherein the circuitry for processing a photoelectric signal processes a photoelectric signal generated by the optical device.
12. A method for manufacturing an optical device, the method comprising:
growing, on a first substrate, a plurality of protrusion serving as a transparent optical portion for providing a metalens function on a surface of the optical device, wherein
a direction of growth of the plurality of protrusions is based on a crystal structure of the first substrate, and wherein
the protrusions differ in size; and
providing circuitry for processing a photoelectric signal generated in the optical device.
13. The method according to claim 12 , wherein the first substrate includes Gallium Nitride.
14. The method according to claim 12 , wherein the size of a protrusion of the plurality of protrusions is based on the position of the protrusion.
15. The method according to claim 12 , wherein the size is at least one of diameter and height.
16. The method according to claim 12 , further comprising:
bonding the first substrate and a second substrate onto each other, the second substrate including silicon.
17. The method according to claim 16 , wherein the circuitry for processing a photoelectric signal generated in the optical device is on the second substrate.
18. The method according to claim 12 , further comprising:
bonding the first substrate and a second substrate onto each other.
19. The method according to claim 18 , wherein the first substrate and the second substrate are made of different materials.
20. The method according to claim 18 , wherein the circuitry for processing a photoelectric signal generated in the optical device is on the second substrate.