Stacked three dimensional photonic crystal, light emitting device, and image display apparatus
Provided is a light emitting structure which can emit light having a plurality of wavelength distributions from a single light emitting structure, can be integrated at high density, and can control a radiation mode pattern of radiation light and polarization thereof. A stacked three-dimensional photonic crystal is composed of a plurality of three-dimensional photonic crystals having photonic band gaps different from one another, which are stacked. Each of the plurality of three-dimensional photonic crystals includes a resonator in which a point defect is formed.
1. A stacked three-dimensional photonic crystal, comprising:
a plurality of three-dimensional photonic crystals having photonic band gaps different from one another, which are stacked,
wherein each of the plurality of three-dimensional photonic crystals includes a resonator in which a point defect is formed,
wherein the point defect contains an active medium that emits light through excitation, and wherein:
the resonators of the plurality of three-dimensional photonic crystals emit light beams having wavelengths different from one another in a stack direction, and
the plurality of three-dimensional photonic crystals are stacked to successively shift central wavelengths of the photonic band gaps to a short wavelength side in the stack direction.
2. A stacked three-dimensional photonic crystal according to claim 1 , wherein the point defect contains an active medium that emits light through current injection.
3. A stacked three-dimensional photonic crystal according to claim 1 , wherein the point defect contains an active medium that emits light through excitation light irradiation.
4. A light emitting device, comprising:
the stacked three-dimensional photonic crystal according to claim 1 ; and
excitation means for exciting an active medium.
5. A light emitting device according to claim 4 , further comprising switching means for controlling a light emitting state of the light emitting device.
6. A light emitting device according to claim 5 , wherein the switching means controls a drive signal supplied to the excitation means.
7. A light emitting device according to claim 5 , wherein the switching means changes a resonant wavelength of each of the resonators to control the light emitting state of the light emitting device.
8. A light emitting device according to claim 5 , wherein the switching means cuts off an optical path of light emitted from each of the resonators to control the light emitting state of the light emitting device.
9. A light emitting device according to claim 4 , wherein the light emitting device emits light in a wavelength region corresponding to at least one of colors of R, G, and B.
10. An image display apparatus, comprising a plurality of light emitting devices which are arranged, each of which is the light emitting device according to any one of claims 4 to 9 .
11. A stacked three-dimensional photonic crystal, comprising:
a plurality of three-dimensional photonic crystals having photonic band gaps different from one another, which are stacked,
wherein each of the plurality of three-dimensional photonic crystals includes a resonator in which a point defect is formed,
wherein the point defect contains an active medium that emits light through excitation, and wherein:
the resonators of the plurality of three-dimensional photonic crystals emit light beams having wavelengths different from one another in a direction reverse to a stack direction, and
the plurality of three-dimensional photonic crystals are stacked to successively shift central wavelengths of the photonic band gaps to a long wavelength side in the stack direction.
12. A stacked three-dimensional photonic crystal according to claim 11 , wherein the point defect contains an active medium that emits light through current injection.
13. A stacked three-dimensional photonic crystal according to claim 11 , wherein the point defect contains an active medium that emits light through excitation light irradiation.
14. A light emitting device, comprising:
the stacked three-dimensional photonic crystal according to claim 11 ; and
excitation means for exciting an active medium.
15. A light emitting device according to claim 14 , further comprising switching means for controlling a light emitting state of the light emitting device.
16. A light emitting device according to claim 15 , wherein the switching means controls a drive signal supplied to the excitation means.
17. A light emitting device according to claim 15 , wherein the switching means changes a resonant wavelength of each of the resonators to control the light emitting state of the light emitting device.
18. A light emitting device according to claim 15 , wherein the switching means cuts off an optical path of light emitted from each of the resonators to control the light emitting state of the light emitting device.
19. A light emitting device according to claim 14 , wherein the light emitting device emits light in a wavelength region corresponding to at least one of colors of R, G, and B.
20. An image display apparatus, comprising a plurality of light emitting devices which are arranged, each of which is the light emitting device according to any one of claims 14 to 19 .