Study Of Multi-Wavelength Laser Devices Based On Lamination Structure

In the development process of organic lasers,many high-performance organic laser materials and devices have emerged.Their characteristics,such as high efficiency,tunable spectra,and flexibility are difficult to achieve in inorganic laser materials and devices.The low cost and easy processing in engineering preparation are also major advantages.These advantages greatly promote the application of organic lasers.This thesis studies multi-wavelength laser devices based on lamination structures.By designing a reasonable lamination structure,multi band gain and laser emission can be achieved in a single device.The specific research contents are:（1）The optical and laser gain properties of alcohol soluble blue emission material PFN-Br are studied.It is first time used as an efficient blue light laser material.On this basis,PFN-Br/F8BT and PFN-Br/F8BT:P3HT lamination devices without interface layers are designed using non polar soluble yellow-green optical gain materials（F8BT）and red optical gain materials（F8BT:P3HT）.The preparation method and optical waveguide mode of direct lamination are verified and theoretically analyzed.Under 390 nm single wavelength laser pumping,blue-green（456 nm-565nm）and blue-red（454 nm-653 nm）dual band amplified spontaneous emission（ASE）are achieved,respectively.Further achievement is the simultaneous emission of blue-green（455 nm-563 nm）and blue-red（457 nm-656 nm,455 nm-664 nm）dual band Distributed Feedback（DFB）lasers,respectively.（2）A lamination structure of perovskite/organics is studied.Based on detailed study of the gain performance of perovskite MAPbBr₃ with different film thicknesses,the MAPbBr₃/F8BT:P3HT stacked device was designed using MAPbBr₃ as a green optical gain medium and F8BT:P3HT as red emission gain medium.The preparation method and optical waveguide mode of the device are verified and theoretically analyzed.Under 450 nm blue single wavelength laser pumping,a green-red（550 nm-655 nm）dual band ASE is achieved.Further utilizing DFB gratings,the simultaneous emission of green-red（557 nm-645 nm）dual band lasers are achieved,which,together with the 450 nm blue laser pump source,demonstrate a simultaneous emission of red-green-blue lasers.（3）Introducing luminescent quantum dots CdSe/ZnS,the lamination structure is expanded.Three lamination structures are constructed,namely（CdSe/ZnS）/F8BT,（CdSe/ZnS）/PS/MAPbBr₃,and（CdSe/ZnS）/PS/MAPbI₃.Under 450 nm single wavelength laser pumping,dual band ASE with yellow-red（577 nm-635 nm）,green-red（548 nm-637 nm）,and red-infrared（637 nm-784 nm）are achieved.