论文标题
纳米光子炮弹景观中的激子扩散和歼灭
Exciton diffusion and annihilation in nanophotonic Purcell landscapes
论文作者
论文摘要
激子通过扩散传播，并通过激子 - 脱离灭绝。纳米光子学可以抵消光发射的减少。但是，常规的增强将发射器视为固定和非互动。在这里，我们超越了局部purcell效果来利用激子动力学。当相互作用的激子通过光学热点扩散时，激子和纳米光特性的平衡会导致增强或抑制的光致发光。我们确定了高扩散和歼灭的限制中的主要增强机制，以将其有害影响转化为额外的发射。我们的指南与基于单层半导体，钙钛矿或有机晶体的有效和高功率发光二极管和激光有关。
Excitons spread through diffusion and interact through exciton-exciton annihilation. Nanophotonics can counteract the resulting decrease in light emission. However, conventional enhancement treats emitters as immobile and noninteracting. Here, we go beyond the localized Purcell effect to exploit exciton dynamics. As interacting excitons diffuse through optical hotspots, the balance of excitonic and nanophotonic properties leads to either enhanced or suppressed photoluminescence. We identify the dominant enhancement mechanisms in the limits of high and low diffusion and annihilation to turn their detrimental impact into additional emission. Our guidelines are relevant for efficient and high-power light-emitting diodes and lasers based on monolayer semiconductors, perovskites, or organic crystals.
