The Kuramoto–Lohe model and collective absorption of a photon
The Kuramoto–Lohe model and collective absorption of a photon
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Kuramoto-Lohe 模型和光子的集体吸收
DOI：
10.1098/rspa.2022.0377
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Scholes, Gregory D.
中科院分区：
文献类型：
--
作者：
Scholes, Gregory D.
研究了无序网络中分子激子态的光吸收。本文的主要目的是研究吸收过程中中间基激发态叠加的相位如何干扰。该相位平均如何启用或抑制吸收到离域状态？为了解决这个问题，使用相位振荡器理论来预测网络集体激发态的纯度。研究结果表明，即使分子网络与环境自由度完全隔离，与位点处跃迁能量的随机分布相比，分子激子态的集体吸收也需要网络中分子之间足够大的电子耦合。建议通过相位同步阈值来预测本质上局域激发态混合物的吸收与纯离域激子态的相干激发之间的“分界线”。
Light absorption by molecular exciton states in disordered networks is studied. The main purpose of this paper is to look at how phases of the intermediate ground–excited state superposition interfere during the absorption process. How does this phase average enable, or suppress, absorption to a delocalized state? To address this question, a theory for phase oscillators is used to predict the purity of the collective excited state of the network. The results of the study suggest that collective absorption by molecular exciton states requires a sufficiently large electronic coupling between molecules in the network compared to the random distribution of transition energies at the sites, even when the molecular network is completely isolated from the environment degrees of freedom. The ‘dividing line’ between absorption to a mixture of, essentially, localized excited states and coherent excitation of a pure delocalized exciton state is suggested to be predicted by the threshold of phase synchronization.