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首页> 外文期刊>Physical review >Asymptotic exchange coupling of quasi-one-dimensional excitons in carbon nanotubes
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Asymptotic exchange coupling of quasi-one-dimensional excitons in carbon nanotubes

机译：碳纳米管中准一维激子的渐近交换耦合

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摘要

An analytical expression is obtained for the biexciton binding energy as a function of the interexciton distance and binding energy of constituent quasi-one-dimensional excitons in carbon nanotubes. This allows one to trace biexciton energy variation and relevant nonlinear absorption under external conditions whereby the exciton binding energy varies. The nonlinear absorption line shapes calculated exhibit characteristic asymmetric (Rabi) splitting as the exciton energy is tuned to the nearest interband plasmon resonance. These results are useful for tunable optoelectronic device applications of optically excited semiconducting carbon nanotubes, including the strong excitation regime with optical nonlinearities.
机译：得到了双激子结合能与激子间距离和碳纳米管中准准一维激子的结合能的关系的解析表达式。这允许在外部条件下追踪双激子能量变化和相关的非线性吸收，从而激子结合能发生变化。随着激子能量调整到最接近的带间等离子体激元共振，计算出的非线性吸收线形状表现出特征性的不对称（Rabi）分裂。这些结果对于光学激发的半导体碳纳米管的可调谐光电器件应用是有用的，包括具有光学非线性的强激发机制。

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