标题： 室温下热展宽可忽略的一维ZnO激子极化子 显示英文标题

标题： One-dimensional ZnO exciton polaritons with negligible thermal broadening at room temperature

摘要： 声子阻尼是固态中纯去相位的主要来源，限制了许多基本量子效应只能在低温下观察到。 在这里，我们展示了半导体中的激子如何能够完全与声子浴解耦，即使在室温下也是如此，这是由于它们与光子的强相互作用。 为此，我们研究了ZnO微线，这是一种由大带隙材料构成的新半导体纳米结构，其中光可以被俘获并引导进入回音壁模式。 在这个系统中，激子和光子之间的非常大的耦合 regimes 导致了一维特性的不寻常的激子-极化子以及高达300meV的Rabi分裂。 我们发现，激子成分高达75%的极化子模式在室温下没有热展宽。 我们表明，这种显著的行为是由于与LO声子能量相比非常大的Rabi分裂。 显示英文摘要

摘要： Phonon damping is the main source of pure dephasing in the solid state, limiting many fundamental quantum effects to low temperature observations. Here we show how excitons in semiconductors can be totally decoupled from the phonon bath, even at room temperature, thanks to their strong interaction with photons. To do so, we investigated ZnO microwires, a new semiconductor nanostructure made of large band-gap material where the light can be trapped and guided into whispering gallery modes. In this system, the very large coupling regime between exciton and photon results in unusual exciton-polariton of one-dimensional character and Rabi splitting as large as 300meV. We find that polariton modes of excitonic fraction up to 75% exhibit no thermal broadening up to room temperature. We show that this remarkable behavior is due to the very large Rabi splitting as compared to the LO phonon energy.