发表机构
Department of Chemistry, Indiana University（印第安纳大学化学系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过实验和理论证明，病毒衣壳的欠阻尼声子模式可调制染料激发态，促进集体极化，从而在室温下维持超辐射发射。
AI 中文摘要
化学结合到二十面体病毒外壳上的激发态有机染料能够自发同步并发射超辐射光脉冲。尽管存在碰撞退相和 inhomogeneous 展宽，该机制在室温下仍能发生，但其原理尚不明确。已知的少数低维凝聚态系统能在室温下表现出超辐射（SR）。在分子系统易波动的环境中，电子-振动耦合被认为起着核心作用。在此，我们通过实验研究了欠阻尼病毒衣壳声子模式的存在性，并在理论上探讨了它们在从非相干发射到协同发射转变中的作用。我们发现，具有 SR 活性的染料标记衣壳表现出欠阻尼低频振荡，这些振荡调制了染料激发态响应，而建模表明这种衣壳运动能够促进超辐射发射所需的集体极化。
英文摘要
Excited organic dyes chemically bound to an icosahedral virus shell can spontaneously synchronize and emit a superradiant burst of light. The mechanism that allows it to occur at room temperature, despite collisional dephasing and inhomogeneous broadening, is not understood. Few other known low-dimensional condensed matter systems exhibit room-temperature superradiance (SR). In the fluctuation-prone environment of molecular-based systems, electron--vibrational coupling has been proposed to play a central role. Here, we addressed experimentally the existence of underdamped virus capsid phonon-like modes and theoretically their involvement in the transition from uncorrelated to cooperative emission. We find that SR-active dye-labeled capsids exhibit underdamped low-frequency oscillations that modulate the dye excited-state response, and modeling shows how such capsid motion can promote the collective polarization required for superradiant emission.
