Apparatus and method for sensing photons

1. An apparatus, comprising:

a plurality of photon sensing layers arranged on top of each other; and

an intermediate layer between each two adjacent sensing layers, the sensing layers being of graphene, and each intermediate layer being configured to prevent a respective color component of light from proceeding into the photon sensing layer next to it; wherein

at least one of the plurality of photon sensing layers comprises a plurality of graphene sub-layers; the apparatus further comprising

two source electrodes and a drain electrode connected to each photon sensing layer.

2. An apparatus according to claim 1 , comprising each said intermediate layer configured to prevent a predetermined color component from proceeding via reflection of the color component.

3. An apparatus according to claim 1 , comprising each said intermediate layer configured to prevent a predetermined color component from proceeding via absorption of the color component.

4. An apparatus according to claim 1 , wherein the apparatus is selected from the group consisting of: an image sensor for a black and white image system, and an image sensor of a color image system.

5. An apparatus according to claim 4 , wherein the color image system comprises an RGB-coded system.

6. An apparatus according to claim 1 , comprising the following layers on top of each other in the following order:

a sensing layer for a first color, a reflective layer or an absorbing layer for the first color, a sensing layer for a second color, a reflective layer or an absorbing layer for the second color, and a sensing layer for a third color.

7. An apparatus according to claim 6 , wherein the first color is blue, the second color is green, and the third color is red.

8. An apparatus according to claim 1 , wherein a sensor pixel is covered by a respective microlens.

9. An apparatus according to claim 1 , wherein the apparatus is a handheld mobile communication device.

10. A method, comprising:

providing a plurality of photon sensing layers arranged on top of each other; and an intermediate layer between each two adjacent sensing layers, the sensing layers being of graphene;

preventing by each intermediate layer a respective color component of light from proceeding into the photon sensing layer next to it;

providing at least one of the plurality of photon sensing layers with a plurality of graphene sub-layers; and

providing two source electrodes and a drain electrode connected to each photon sensing layer.

11. A method according to claim 10 , comprising:

preventing by each intermediate layer a respective color component from proceeding into the photon sensing layer next to it via reflecting the color component.

12. A method according to claim 10 , comprising:

preventing by each intermediate layer a respective color component from proceeding into the photon sensing layer next to it via absorbing the color component.

13. A method according to claim 10 , comprising:

providing an apparatus for sensing color components in the apparatus, the apparatus being selected from the group consisting of: an image sensor for a black and white image system, and an image sensor of a color image system.

14. A method according to claim 13 , wherein the color image system comprises an RGB-coded system.

15. A method according to claim 10 , comprising:

manufacturing said photon sensing layers and each said intermediate layer by a manufacturing method which is selected from a group consisting of: an atomic layer deposition method, a chemical vapor deposition method, a spin coating method, and an RF sputtering method.

16. A method according to claim 10 , comprising:

manufacturing a stacked structure comprising layers on top of each other, where the layers are in the following order:

a sensing layer for a first color, a reflective layer or an absorbing layer for the first color, a sensing layer for a second color, a reflective layer or an absorbing layer for the second color, and a sensing layer for a third color.

17. A method according to claim 16 , wherein the first color is blue, the second color is green, and the third color is red.

18. A method according to claim 10 , comprising:

covering a sensor pixel by a respective microlens.