Strong Exciton–Photon Coupling in Dye‐Doped Polymer Microcavities,Macromolecular Materials and Engineering

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Strong Exciton–Photon Coupling in Dye‐Doped Polymer Microcavities
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-08-18 , DOI: 10.1002/mame.202000456
Ji Tang _{1,

2} , Ang Ren _{1,

2} , Zhonghao Zhou _{1,

2} , Yong Sheng Zhao _{1,

2}

Affiliation

Organic strongly coupled microcavities are of crucial importance in broad application fields, ranging from creation of Bose–Einstein condensates to control of chemistry reactions. Generally, strong coupling occurs in microcavities containing large ensembles of molecules, which, however, may suffer from molecular aggregation and luminescence quenching, restricting the optical applications of the microcavities. Here, the emission properties of dye‐doped polymer microcavities in strong coupling regime are investigated. The dispersion of dye molecules suppresses the aggregation‐caused quenching, and therefore the microcavities exhibit strong photoluminescence (PL) corresponding to the polariton branches. The time‐resolved PL measurement results reveal that the observed long PL lifetimes of the microcavities are dominated by the rates of the slow relaxation from the exciton reservoir to the polariton branches. The results will provide a useful enlightenment for using dye‐doped polymer microcavities to investigate strong coupling and construct polaritonic devices.

中文翻译：

染料掺杂的聚合物微腔中的强激子-光子耦合

有机强耦合微腔在广泛的应用领域中至关重要，从形成玻色-爱因斯坦冷凝物到控制化学反应。通常，强耦合发生在包含大分子分子的微腔中，然而，其可能遭受分子聚集和发光猝灭，从而限制了微腔的光学应用。在这里，研究了染料偶联的聚合物微腔在强耦合条件下的发射特性。染料分子的分散抑制了聚集引起的猝灭，因此微腔表现出与极化子分支相对应的强光致发光（PL）。时间分辨的PL测量结果表明，观察到的微腔的长PL寿命主要由激子储层到极化子分支的缓慢弛豫速率决定。该结果将为使用染料掺杂的聚合物微腔研究强耦合和构建极化子器件提供有益的启示。

更新日期：2020-10-12

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