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arXiv 2602.23748physics.chem-phcond-mat.mes-hallquant-ph
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光学腔中的分子电子转移:从激子到声光极子

Molecular Electron Transfer in Optical Cavities: From Excitonic to Vibronic Polaritons

Kyoto University(京都大学);Hokkaido University(北海道大学)

Takumi Hidaka, Tomohiro Fukushima, Nguyen Thanh Phuc

AI总结:

本文通过HEOM方法研究光学腔耦合分子中的电子转移动力学,揭示极子形成中的共振和集体效应,并展示强耦合下电子转移速率饱和特性,揭示了量子干涉对转移速率的影响。

摘要:

光学腔中分子激发态与量化电磁场的强耦合为控制分子系统物理化学性质提供了有力手段。本文利用数值精确的层次方程动力学(HEOM)方法研究了腔耦合分子中的电子转移(ET)动力学,该方法能够捕捉非微扰和非马尔可夫效应,超越了标准微扰理论。我们识别了与极子形成相关的不同共振和集体效应,并表明在强耦合 regime 中电子转移速率饱和,这一特性未被微扰方法捕获。我们进一步扩展了腔修改的电子转移模型,将其与分子电偶极矩的核坐标依赖性相结合,从而产生涉及分子电子和振动自由度及腔光子的三体相互作用。这种声光极子形成导致电子转移速率对光-物质耦合强度和腔频率的非单调振荡依赖性,我们将其归因于多个转移路径之间的量子干涉。这些发现确立了腔修改的电子转移作为多通道量子过程,由电子、振动和光子自由度的相互作用所支配。

英文摘要:

Strong coupling between molecular excitations and quantized electromagnetic fields in optical cavities provides a powerful means to control the physical and chemical properties of molecular systems. Here, we study electron transfer (ET) dynamics in cavity-coupled molecules using the numerically exact hierarchical equations of motion (HEOM) method, which captures nonperturbative and non-Markovian effects beyond standard perturbative theories. We identify distinct resonance and collective effects associated with polariton formation and show that the ET rate saturates in the strong-coupling regime, a feature not captured by perturbative approaches. We further extend the cavity-modified ET model by incorporating the nuclear-coordinate dependence of molecular electric dipole moments, which gives rise to a three-body interaction involving molecular electronic and vibrational degrees of freedom and cavity photons. This vibronic polariton formation leads to non-monotonic, oscillatory dependencies of the ET rate on the light-matter coupling strength and cavity frequency, which we attribute to quantum interference among multiple transfer pathways. These findings establish cavity-modified electron transfer as a multichannel quantum process governed by the interplay of electronic, vibrational, and photonic degrees of freedom.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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