| With the rapid development of information technology,nano-photonics has attracted extensive attention from researchers.It is very important to realize the controllable construction of nano-photonic devices on the micro/nano-scale.Organic small molecules have become attractive photonic materials due to their optical characteristics.However,the lack of understanding organic nanomaterial,we have encountered great obstacles in the construction of organic nanomaterial.Based on this,this paper takes organic small molecules as research object,constructs two-dimensional organic micro-disk structure and spindle-like structure respectively under control according to the understanding of molecular self-assembly law,and studies the structure-activity relationship between morphology structure and laser performance.It mainly includes the following two parts:(1)We developed a universal oil-water micro-interface self-assembly method,which can self-assemble small organic molecules with weak intermolecular forces into two-dimensional organic micro-disk structure.The DPAVBi micro-disk can be used as gain medium and WGM resonator at the same time.In addition,the varieties of coupled micro-disk structures are synthesized under control.Among them,the double micro-disk coupled structure realizes the single-mode micro/nano laser with low threshold value.The multi-disk coupled structure has the resonant waveguide behavior.(2)Two dimensional organic spindle-like structures were prepared by using the anti-solvent strategy and the possible formation mechanism of this strategy was elucidated.Based on this,we also synthesized DPAVBi fusiform structures with different length-diameter ratios.Notably,with the increase of the length-diameter ratio of the two-dimensional organic fusiform structure,the laser emission angle of the sample continues to decrease,showing the characteristic of directional output,while retaining the high Q value and the relatively low laser threshold. |
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