论文标题
甲基水杨酸甲酯与Fabry-Perot微腔的多模振动强耦合
Multimode Vibrational Strong Coupling of Methyl Salicylate to a Fabry-Perot Microcavity
论文作者
论文摘要
IR活性分子过渡与腔的光学模式的强耦合导致振动极化子，这为通过腔体的密闭电磁场打开了一种新的方法来控制化学反应性。在这项研究中，我们设计了一个可电压的开放式微腔，并显示了甲基水杨酸甲酯中多个振动偏振子的形成。当腔模式与甲基水杨酸甲基甲基拉伸振动杂交时，观察到狂犬病分裂和极化抗骨骼行为。由于这种振动有助于甲基水杨酸甲酯中光诱导的质子转移过程的反应坐标，因此我们建议该耦合可用于调节分子的光物理特性。此外，基于耦合谐波振荡器的提出的理论模型表明，还必须考虑将未偶联分子的吸收正确地对实验光谱进行建模，并且同时将多个分子振动与同一空腔模式同时耦合对rabi裂解。
The strong coupling of an IR-active molecular transition with an optical mode of the cavity results in vibrational polaritons, which opens a new way to control chemical reactivity via confined electromagnetic fields of the cavity. In this study, we design a voltage-tunable open microcavity and we show the formation of multiple vibrational polaritons in methyl salicylate. A Rabi splitting and polariton anticrossing behaviour is observed when the cavity mode hybridizes with the C=O stretching vibration of methyl salicylate. As this vibration contributes to the reaction coordinate of the photoinduced proton transfer process in methyl salicylate, we suggest the coupling might be used to modulate the photophysical properties of the molecule. Furthermore, the proposed theoretical model based on coupled harmonic oscillator reveals that the absorption of uncoupled molecules must also be considered to model the experimental spectra properly and that simultaneous coupling of multiple molecular vibrations to the same cavity mode has a significant influence on the Rabi splitting.
