Enhanced Light-Matter Interaction and Polariton Relaxation by the Control of Molecular Orientation
Enhanced Light-Matter Interaction and Polariton Relaxation by the Control of Molecular Orientation
复制标题
DOI：
10.1002/adom.202101048
复制
发表时间：
2021-09-24
影响因子：
9
通讯作者：
Adachi, Chihaya
中科院分区：
文献类型：
--
作者：
Ishii, Tomohiro;Bencheikh, Fatima;Adachi, Chihaya
激子极化子，其中受激有机分子的电子态和光子态强耦合，可以在室温下形成玻色-爱因斯坦凝聚体（BEC）。然而，到目前为止，报道的光激发下有机极化子BEC的阈值高达P-th = 11-500 mu J cm(-2)。降低凝聚阈值的一种途径是通过排列分子跃迁偶极矩来增加拉比能量。在该报告中，证明了控制基于苝的盘状染料的取向，该染料能够在介晶柱状结构中自组织，可以显着增强光腔中的激子-光子相互作用和极化子弛豫率。这些结果表明了分子取向对于强光-物质相互作用的重要性，并为实现有机低阈值极化子BEC系统和电驱动有机极化子BEC提供了一种有前景的策略。
Exciton-polaritons, in which the electronic state of an excited organic molecule and a photonic state are strongly coupled, can form a Bose-Einstein condensate (BEC) at room temperature. However, so far, the reported thresholds of organic polariton BECs under optical excitation are as high as P-th = 11-500 mu J cm(-2). One route toward lowering the condensation threshold is to increase the Rabi energy by aligning the molecular transition dipole moments. In this report, it is demonstrated that control of the orientation of a perylene-based discotic dye, which is able to self-organize in mesogenic columnar structures, can significantly enhance exciton-photon interaction and polariton relaxation rate in optical cavities. These results show the importance of the molecular orientation for strong light-matter interactions and provide a promising strategy toward the realization of an organic low threshold polariton BEC system and electrically driven organic polariton BEC.