Polariton dispersion relations under condensation in a CuBr microcavity
Polariton dispersion relations under condensation in a CuBr microcavity
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CuBr 微腔中冷凝下的极化子色散关系
DOI：
10.1002/pssc.201510076
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and DaeGwi Kim
中科院分区：
文献类型：
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作者：
Masaaki Nakayama;Katsuya Murakami;and DaeGwi Kim
我们研究了具有 HfO2/SiO2 分布布拉格反射器的 CuBr 微腔中的激子-极化子凝聚，重点研究了凝聚对极化子色散关系的影响。使用角分辨光致发光（PL）光谱测量照明下极化子分布与面内波矢量 k// 的函数关系。此外，我们通过使用角度分辨反射光谱分析获得的结果，描述了固有极化子色散关系作为参考数据。研究发现，极化子凝聚导致下极化子分支（LPB）发生较大的蓝移，并且在基态atk//=0周围形成平坦的色散关系。利用非平衡凝聚特有的扩散戈德斯通模式理论，定量分析了极化子凝聚下LPB的重整化色散关系。 （© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
We have investigated the exciton‐polariton condensation in a CuBr microcavity with HfO2/SiO2distributed Bragg reflectors, focusing on condensation effects on polariton dispersion relations. The polariton distribution as a function of in‐plane wave vectork//under illumination was measured with angle‐resolved photoluminescence (PL) spectroscopy. In addition, we characterized the intrinsic polariton dispersion relations as reference data from analysis of the results obtained using angle‐resolved reflectance spectroscopy. It was found that the polariton condensation causes a large blueshift of the lower polariton branch (LPB) and a flat dispersion relation around the ground state atk//=0. The renormalized dispersion relation of the LPB under the polariton condensation was quantitatively analysed using a theory for a diffusive Goldstone mode peculiar to nonequilibrium condensation. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)