Abstract A single-walled carbon nanotube (SWCNT) with conjugated polymer molecules is analyzed via optical spectroscopy. The presence of strongly localized excitonic states in the SWCNT is confirmed using time-integrated photoluminescence (PL). The PL spectrum exhibits extremely narrow width (~0.8 meV) which is attributed to the strong confinement of the states by polymer molecules. In addition, I observed that the excited states are gradually filled as a function of the excitation power, which supports the localized excitonic behavior. Only the ground excitonic state is observed at low excitation powers, but three additional PL peaks appear as the excitation power is increased. Especially, the power-dependent PL spectrum shows a blueshift and increased width, which can be elucidated in terms of quantum confined stark effect and the screening of induced electric fields. Overall, I demonstrate that the presence of polymer molecules induces several localized states in a single SWCNT.

中文翻译：

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具有聚合物分子的单个碳纳米管中的强局域态

摘要 通过光谱分析了具有共轭聚合物分子的单壁碳纳米管 (SWCNT)。使用时间积分光致发光 (PL) 证实了 SWCNT 中存在强局域激子态。PL 光谱表现出极窄的宽度（~0.8 meV），这归因于聚合物分子对状态的强限制。此外，我观察到激发态作为激发功率的函数逐渐填充，这支持局部激子行为。在低激发功率下仅观察到基激子态，但随着激发功率的增加出现三个额外的 PL 峰。特别是，与功率相关的 PL 光谱显示出蓝移和增加的宽度，这可以通过量子限制斯塔克效应和感应电场的屏蔽来阐明。总的来说，我证明了聚合物分子的存在会在单个 SWCNT 中诱导几种局部状态。