Functional Separation of Energy Transfer and Photon Absorption of Excitons Formed in Circular Nanoantennae,Physica Status Solidi (B) - Basic Solid State Physics

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Functional Separation of Energy Transfer and Photon Absorption of Excitons Formed in Circular Nanoantennae
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2022-08-04 , DOI: 10.1002/pssb.202200206
Hisaki Oka ₁

Affiliation

An efficient and rapid energy transfer (ET) mechanism is theoretically proposed only by mimicking the circular structure of natural photosynthetic light-harvesting (LH) antennae, without spatial and energetic disorders as in natural photosynthetic systems. Two B850 LH complexes of photosynthetic bacterium are adopted, and it is shown that for close LH antennae the ET rate can be optimized by functionally separating ET from photon absorption within exciton energy levels by an adjustment of the distance between the LH antennae at room temperature. As a result, for close LHs, the two processes of photon absorption and ET can be energetically and functionally divided within the same exciton energy level. From the analysis of the temperature dependence of transfer rate, it is also shown that the two energetically separated processes are connected by thermal pumping of the exciton population and an optimized ET rate can be achieved at room temperature when the energy difference between optically allowed and forbidden states is comparable with the thermal energy of the environment.

中文翻译：

圆形纳米天线中形成的激子的能量转移和光子吸收的功能分离

仅通过模仿自然光合采光（LH）天线的圆形结构，理论上提出了一种高效快速的能量转移（ET）机制，而没有自然光合系统中的空间和能量紊乱。采用两个 B850 LH 光合细菌复合物，结果表明，对于靠近的 LH 天线，通过在室温下调整 LH 天线之间的距离，可以通过功能性地将 ET 与激子能级内的光子吸收分开来优化 ET 率。因此，对于接近的 LH，光子吸收和 ET 这两个过程可以在相同的激子能级内在能量上和功能上分开。从传输速率的温度依赖性分析，

更新日期：2022-08-04

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