Organic polariton laser
The present invention relates to organic lasers. More specifically, the present invention is directed to an organic laser that provides a self-stimulated source of coherent radiation originating from organic microcavity polaritons. The organic polariton laser of the present invention comprises a substrate, a resonant microcavity comprising an organic polariton emission layer; and an optical pump. In preferred embodiments the optical pump is a microcavity OLED allowing for the fabrication of a self-contained or integrated device.
1. An organic polariton laser comprising:
a substrate;
a resonant polariton microcavity comprising an organic polariton emission layer; and
a microcavity OLED as an optical pump for the polariton microcavity, wherein the microcavity OLED includes a reflector layer, wherein the emission of the microcavity OLED is directionally focused towards the polariton microcavity, and
wherein the emission intensity of the microcavity OLED is directionally focused towards a non-orthogonal angle with respect to the microcavity OLED;
wherein the polariton microcavity and the microcavity OLED form an integrated device structure; and
wherein the organic polariton laser provides a stimulated source of coherent radiation.
2. The organic polariton laser of claim 1 , wherein the resonant polariton microcavity has a Q greater than about 500.
3. The organic polariton laser of claim 1 , wherein the polariton microcavity comprises a first reflective layer, the organic polariton emission layer, and a second reflective layer.
4. The organic polariton laser of claim 3 , wherein the first reflective layer and the second reflective layer are distributed Bragg reflector layers.
5. The organic polariton laser of claim 4 , wherein the distributed Bragg reflector layers each comprise TiO 2 /SiO 2 multilayer stacks.
6. The organic polariton laser of claim 1 , wherein the organic polariton emission layer comprises a pseudoisocyanine.
7. The organic polariton laser of claim 1 , wherein the organic polariton emission layer comprises an organic material selected from cyanine dyes, transition metal porpyhrins, a-conjugated polysilanes, and polyaromatic cyclic anhydrides.
8. The organic polariton laser of claim 7 wherein the organic polariton emission layer comprises a polyaromatic cyclic anhydride.
9. The organic polariton laser of claim 8 wherein the organic polariton emission layer comprises 3,4,7,8-naphthalene dianhydride.
10. The organic polariton laser of claim 1 , further comprising a dielectric spacer between the resonant polariton microcavity and the microcavity OLED.
11. The organic polariton laser of claim 4 , wherein the reflector for the microcavity OLED is a distributed Bragg reflector.
12. The organic polariton laser of claim 1 , wherein the emission of the microcavity OLED is tuned to the absorption spectrum of the organic polariton emission layer.
13. The organic polariton laser of claim 1 , wherein the emission of the microcavity OLED is directionally focused towards a non-orthogonal angle with respect to the microcavity OLED.
14. The organic polariton laser of claim 1 , wherein the peak emission intensity of the microcavity OLED is in the direction of the non-orthogonal angle.
15. The organic polariton laser of claim 7 , wherein the organic polariton emission layer is formed by thermal evaporation of the organic material.
16. The organic polariton laser of claim 15 , wherein the organic polariton emission layer is crystalline or polycrystalline.