Recently, inorganic–organic perovskite nanowires with strong photon confinement and isotropy have attracted considerable attention for advanced applications in optoelectronic devices from lasers and photodetectors to transistors. Moreover, their high exciton oscillation strength and binding energy make them very promising for polariton devices in the strong light–matter interaction region. This study presents the strong exciton–photon coupling in hybrid inorganic–organic CH₃NH₃PbBr₃ micro/nanowire cavities at room temperature. Clear anticrossing feature is observed by using remote excitation photoluminescence emission spectroscopy with vacuum Rabi splitting energy up to 390 meV. The observed vacuum Rabi splitting energy of up to ≈390 meV (0.32 × 3.66 µm²) is attributed to large oscillator strength and photon confinement in reduced dimension of the micro/nanowire based Fabry–Pérot cavities. With increasing pump fluence, the exciton–photon coupling is weakened because of carrier screening effect, which leads to the occurrence of photonic lasing instead of polariton lasing. The demonstrated strong exciton–photon coupling in perovskite micro/nanowire cavities is significant for the development of high performance polariton‐based incoherent and coherent light sources, nonlinear optics, and slow light applications.

中文翻译：

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无机-有机钙钛矿微/纳米线混合中的强激子-光子耦合。

近来，具有强光子限制和各向同性的无机-有机钙钛矿纳米线已经在从激光器，光电探测器到晶体管的光电器件的高级应用中引起了相当大的关注。此外，它们的高激子振荡强度和结合能使它们在强光-物质相互作用区域的极化子器件中非常有前途。这项研究提出了室温下无机-有机杂化CH ₃ NH ₃ PbBr ₃微/纳米线腔中的强激子-光子耦合。通过使用具有高达390 meV的真空Rabi裂解能的远程激发光致发光发射光谱学，观察到了清晰的抗交叉特征。观察到的真空拉比分裂能高达≈390meV（0.32×3.66 µm²）归因于较大的振荡器强度和基于微米/纳米线的Fabry-Pérot腔尺寸减小的光子限制。随着泵浦注量的增加，由于载流子屏蔽效应，激子与光子的耦合减弱，从而导致发生光子激射而不是极化子激射。钙钛矿微/纳米线腔中已证明的强激子-光子耦合对基于高性能极化子的非相干和相干光源，非线性光学和慢光应用的开发具有重要意义。