Polariton ring condensates and sunflower ripples in an expanding quantum liquid
Polariton ring condensates and sunflower ripples in an expanding quantum liquid
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DOI：
10.1103/physrevb.85.235303
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发表时间：
2012-06-05
影响因子：
3.7
通讯作者：
Baumberg, Jeremy J.
中科院分区：
文献类型：
--
作者：
Christmann, Gabriel;Tosi, Guilherme;Baumberg, Jeremy J.
光学泵浦高质量的半导体微腔允许自发形成极化激元凝聚体，其可以在许多微米的距离上传播。紧聚焦的泵浦点在这里被发现产生扩展的非相干瓶颈极化激元，其相干放大弹道极化激元，并导致在空间中形成不寻常的环形凝聚体。这种量子液体被发现形成一个显着的向日葵状的空间涟漪图案，这是由于自干涉瑞利散射相干极化激元波在切伦科夫制度。
Optically pumping high-quality semiconductor microcavities allows the spontaneous formation of polariton condensates, which can propagate over distances of many microns. Tightly focused pump spots here are found to produce expanding incoherent bottleneck polaritons, which coherently amplify the ballistic polaritons and lead to the formation of unusual ring condensates in space. This quantum liquid is found to form a remarkable sunflowerlike spatial ripple pattern, which arises from self-interference with Rayleigh-scattered coherent polariton waves in the Cerenkov regime.