Enhancing the electrical conductance through amorphous nondoped polymers is challenging. Here, we show that vibrational strong coupling (VSC) of intrinsically nonconducting and amorphous polymers such as polystyrene, deuterated polystyrene, and poly(benzyl methacrylate) to the vacuum electromagnetic field of the cavity enhances the electrical conductivity by at least 6 orders of magnitude compared to the uncoupled polymers. Remarkably, the observed extraordinary conductance is vibrational mode selective and occurs only under the VSC of the aromatic C–H(D) out-of-plane bending modes of the polymers. The conductance is thermally activated at the onset of strong coupling and becomes temperature-independent as the collective strong coupling strength increases. The electrical characterizations are performed without external light excitation, demonstrating the role of vacuum electromagnetic field–matter strong coupling in enhancing long-range transport even in amorphous nonconducting polymers.

中文翻译：

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非晶态非导电聚合物在振动强耦合下具有非凡的电导率

通过无定形非掺杂聚合物增强电导率具有挑战性。在这里，我们表明，本质上不导电的无定形聚合物（例如聚苯乙烯、氘代聚苯乙烯和聚甲基丙烯酸苄酯）与腔体真空电磁场的振动强耦合（VSC）使电导率提高了至少 6 个数量级。到未偶联的聚合物。值得注意的是，观察到的异常电导具有振动模式选择性，并且仅发生在聚合物的芳香族 C–H(D) 面外弯曲模式的 VSC 下。电导在强耦合开始时被热激活，并且随着集体强耦合强度的增加而变得与温度无关。电学表征是在没有外部光激发的情况下进行的，证明了真空电磁场-物质强耦合在增强长程传输方面的作用，甚至在非晶态非导电聚合物中也是如此。