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首页> 外文期刊>Journal of Applied Physics >Nonresonant feeding of photonic crystal nanocavity modes by quantum dots
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Nonresonant feeding of photonic crystal nanocavity modes by quantum dots

机译：量子点对光子晶体纳米腔模式的非共振馈电

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摘要

We experimentally probe the nonresonant feeding of photons into the optical mode of a two dimensional photonic crystal nanocavity from the discrete emission from a quantum dot. For a strongly coupled system of a single exciton and the cavity mode, we track the detuning-dependent photoluminescence intensity of the exciton-polariton peaks at different lattice temperatures. At low temperatures we observe a clear asymmetry in the emission intensity depending on whether the exciton is at higher or lower energy than the cavity mode. At high temperatures this asymmetry vanishes when the probabilities to emit or absorb a phonon become similar. For a different dot-cavity system where the cavity mode is detuned by ΔE > 5 meV to lower energy than the single exciton transitions emission from the mode remains correlated with the quantum dot as demonstrated unambiguously by cross-correlation photon counting experiments. By monitoring the temporal evolution of the photoluminescence spectrum, we show that feeding of photons into the mode occurs from multi-exciton transitions. We observe a clear anti-correlation of the mode and single exciton emission; the mode emission quenches as the population in the system reduces toward the single exciton level while the intensity of the mode emission tracks the multi-exciton transitions.
机译：我们实验性地从量子点的离散发射中探究了非共振馈入光子进入二维光子晶体纳米腔的光学模式。对于单激子和腔模的强耦合系统，我们跟踪在不同晶格温度下激子-极化子峰的失谐相关光致发光强度。在低温下，根据激子处于比腔模式高还是低的能量，我们观察到发射强度存在明显的不对称性。在高温下，当发射或吸收声子的概率变得相似时，这种不对称性就会消失。对于不同的点腔系统，其腔模通过ΔE> 5 meV失谐至比单激子跃迁更低的能量，该模的发射仍然与量子点相关，如通过互相关光子计数实验所清楚地表明的。通过监测光致发光光谱的时间演化，我们表明光子进入模式的产生来自多激子跃迁。我们观察到模式和单激子发射的明显反相关；当系统中的粒子数朝单激子能级减小时，模式发射会猝灭，而模式发射的强度会跟踪多激子跃迁。

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  • 来源
    《Journal of Applied Physics》 |2011年第10期|p.17-21|共5页
  • 作者

    A. Laucht; N. Hauke; A. Neumann; T. Günthner; F. Hofbauer; A. Mohtashami; K. Müller; G. Böhm; M. Bichler; M.-C. Amann; M. Kaniber; J. J. Finley;

  • 作者单位

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

    Water Schottky Institut,Technische Universität München,Mm COULOMBWALL 3,85748 Garching,Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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