E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2010 Mar 26;104(12):126403. doi: 10.1103/PhysRevLett.104.126403.
We have performed real and momentum space spectroscopy of exciton polariton condensates in a GaAs-based microcavity under nonresonant excitation with an intensity-stabilized laser. An effective trapping mechanism is revealed, which is due to the stimulated scattering gain inside the finite excitation spot combined with the short lifetime. We observe several quantized modes while the lowest state shows Heisenberg-limited real and momentum space distributions. The experimental findings are qualitatively reproduced by an open dissipative Gross-Pitaevskii equation model.
我们在非共振激发下，使用强度稳定的激光对基于 GaAs 的微腔中的激子极化激元凝聚体进行了实空间和动量空间的光谱学研究。揭示了一种有效的俘获机制，这是由于有限激发光斑内的受激散射增益与短寿命相结合。我们观察到了几个量子化模式，而最低状态则表现出海森堡极限的实空间和动量空间分布。实验结果通过开放耗散 Gross-Pitaevskii 方程模型得到了定性再现。
