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arXiv 1407.6535cond-mat.mes-hallcond-mat.mtrl-sciphysics.optics
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含InGaAs量子阱的平面微腔中的极化子凝聚

Polariton condensation in a planar microcavity with InGaAs quantum wells

Pasquale Cilibrizzi, Alexis Askitopoulos, Matteo Silva, Edmund Clarke, Joanna M. Zajac, Wolfgang Langbein, Pavlos G. Lagoudakis

摘要:

极化子晶格凝聚体为芯片上的量子仿真提供了一个平台。扩展极化激元晶格中的相互作用目前受到微腔的固有光子无序的限制。在这里,我们制作了一个应变补偿平面GaAs/AlAs微腔嵌入InGaAs量子阱和报告极化激元凝聚下的非共振光激发。极化激元凝聚的证据支持光谱反射和透射几何,而第二个阈值光子激射的观察使我们能够最终区分强耦合和弱耦合非线性制度。

英文摘要:

Polariton lattice condensates provide a platform for on chip quantum emulations. Interactions in extended polariton lattices are currently limited by the intrinsic photonic disorder of microcavities. Here, we fabricate a strain compensated planar GaAs/AlAs microcavity with embedded InGaAs quantum wells and report on polariton condensation under non-resonant optical excitation. Evidence of polariton condensation is supported spectroscopically both in reflection and transmission geometry, whilst the observation of a second threshold to photon lasing allows us to conclusively distinguish between the strong- and weak-coupling non-linear regimes.

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