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Influence of interactions with noncondensed particles on the coherence of a one-dimensional polariton condensate

机译：与非凝聚粒子相互作用对一维极化子凝聚物相干性的影响

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摘要

One-dimensional polariton condensates (PoCos) in a photonic wire are generated through nonresonant laser excitation, by which also a reservoir of background carriers is created. Interaction with this reservoir may affect the coherence of the PoCo, which is studied here by injecting a condensate locally and monitoring the coherence along the wire. While the incoherent reservoir is mostly present within the excitation laser spot, the condensate can propagate ballistically through the wire. Photon correlation measurements show that far from the laser spot the second-order correlation function approaches unity value, as expected for the coherent condensed state. When approaching the spot, however, the correlation function increases up to values of 1.2 showing the addition of noise to the emission due to interaction with the reservoir. This finding is substantiated by measuring the first-order coherence by a double-slit experiment, which shows a reduced visibility of interference at the excitation laser spot.
机译：光子线中的一维极化子凝结物（PoCos）是通过非共振激光激发而产生的，由此还会产生背景载流子。与该储层的相互作用可能会影响PoCo的相干性，此处可通过局部注入冷凝水并监测沿导线的相干性来进行研究。尽管不相干的储层主要存在于激发激光点内，但凝结物可以通过导线弹道传播。光子相关测量表明，与相干凝聚态一样，二阶相关函数远离激光点，接近单位值。但是，当接近该点时，相关函数增加到1.2的值，表明由于与储层的相互作用而在发射中增加了噪声。通过双缝实验测量一阶相干性可以证实这一发现，该实验显示出激发激光点处的干涉可见性降低。

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  • 来源
    《Physical review》 |2014年第11期|115119.1-115119.7|共7页
  • 作者

    Johannes Schmutzler; Tomasz Kazimierczuk; OEmer Bayraktar; Marc Assmann; Manfred Bayer; Sebastian Brodbeck; Martin Kamp; Christian Schneider; Sven Hoefling;

  • 作者单位

    Experimentelle Physik 2, Technische Universitaet Dortmund, D-44221 Dortmund, Germany;

    Experimentelle Physik 2, Technische Universitaet Dortmund, D-44221 Dortmund, Germany;

    Experimentelle Physik 2, Technische Universitaet Dortmund, D-44221 Dortmund, Germany;

    Experimentelle Physik 2, Technische Universitaet Dortmund, D-44221 Dortmund, Germany;

    Experimentelle Physik 2, Technische Universitaet Dortmund, D-44221 Dortmund, Germany;

    Technische Physik, Physikalisches Institut, Wilhelm Conrad Roentgen Research Center for Complex Material Systems, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany;

    Technische Physik, Physikalisches Institut, Wilhelm Conrad Roentgen Research Center for Complex Material Systems, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany;

    Technische Physik, Physikalisches Institut, Wilhelm Conrad Roentgen Research Center for Complex Material Systems, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany;

    Technische Physik, Physikalisches Institut, Wilhelm Conrad Roentgen Research Center for Complex Material Systems, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany ,SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, United Kingdom;

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  • 关键词

    polaritons (including photon-phonon and photon-magnon; semiconductor lasers; laser diodes; microcavity and microdisk lasers; collective excitations;

    机译：极化子（包括光子-声子和光子-磁振子;半导体激光器;激光二极管;微腔和微盘激光器;集体激发）;

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