Balili R, Hartwell V, Snoke D, Pfeiffer L, West K
Department of Physics and Astronomy, University of Pittsburgh, 3841 O'Hara Street, Pittsburgh, PA 15260, USA.
Science. 2007 May 18;316(5827):1007-10. doi: 10.1126/science.1140990.
We have created polaritons in a harmonic potential trap analogous to atoms in optical traps. The trap can be loaded by creating polaritons 50 micrometers from its center that are allowed to drift into the trap. When the density of polaritons exceeds a critical threshold, we observe a number of signatures of Bose-Einstein condensation: spectral and spatial narrowing, a peak at zero momentum in the momentum distribution, first-order coherence, and spontaneous linear polarization of the light emission. The polaritons, which are eigenstates of the light-matter system in a microcavity, remain in the strong coupling regime while going through this dynamical phase transition.
我们在类似于光学阱中原子的谐波势阱中创造了极化激元。通过在距离阱中心50微米处产生极化激元并使其漂移进入阱中，可实现阱的加载。当极化激元的密度超过临界阈值时，我们观察到了玻色 - 爱因斯坦凝聚的一些特征：光谱和空间变窄、动量分布中零动量处的峰值、一阶相干性以及发光的自发线性极化。极化激元作为微腔中光 - 物质系统的本征态，在经历这个动态相变过程中仍处于强耦合 regime。 （注：这里“regime”直接保留英文，因为在物理学术语中有时保留英文更合适，可根据实际情况决定是否进一步意译等处理，如果有要求可再调整）
