Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling.
Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling.
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DOI：
10.1038/lsa.2017.30
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发表时间：
2017-08
期刊：
影响因子：
--
通讯作者：
Reitzenstein S
中科院分区：
文献类型：
--
作者：
Kreinberg S;Chow WW;Wolters J;Schneider C;Gies C;Jahnke F;Höfling S;Kamp M;Reitzenstein S
测量和计算结果的一类新的发射器的发射特性工作在腔量子电动力学制度。该结构基于高精细度GaAs/AlAs微柱腔，每个微柱腔都具有由InGaAs量子点（QD）层组成的活性介质，并且具有将大部分自发发射引导到一个腔模式（高β因子）的显著特征。本文论证了用常规（低β因子）腔产生激光的通常判据，即输入-输出曲线中的尖锐非线性伴随着明显的线宽变窄，必须用等时间的二阶光子自相关函数来加强以确认激光。该论文还表明，等时间的二阶光子自相关函数是有用的识别超辐射，在高β微腔与量子点操作可能的相关性的表现。在巩固收集到的数据和识别激光作用的物理基础方面，理论和实验都表明只依赖于腔内光子数。这一论断的证据来自我们所有关于发射相干性和波动的测量和计算数据，从发光二极管（LED）和腔增强型LED到激光器，都位于相同的两条曲线上：一条是线宽变窄与腔内光子数的关系，另一条是g（2）（0）与腔内光子数的关系。
Measured and calculated results are presented for the emission properties of a new class of emitters operating in the cavity quantum electrodynamics regime. The structures are based on high-finesse GaAs/AlAs micropillar cavities, each with an active medium consisting of a layer of InGaAs quantum dots (QDs) and the distinguishing feature of having a substantial fraction of spontaneous emission channeled into one cavity mode (high β-factor). This paper demonstrates that the usual criterion for lasing with a conventional (low β-factor) cavity, that is, a sharp non-linearity in the input–output curve accompanied by noticeable linewidth narrowing, has to be reinforced by the equal-time second-order photon autocorrelation function to confirm lasing. The paper also shows that the equal-time second-order photon autocorrelation function is useful for recognizing superradiance, a manifestation of the correlations possible in high-β microcavities operating with QDs. In terms of consolidating the collected data and identifying the physics underlying laser action, both theory and experiment suggest a sole dependence on intracavity photon number. Evidence for this assertion comes from all our measured and calculated data on emission coherence and fluctuation, for devices ranging from light-emitting diodes (LEDs) and cavity-enhanced LEDs to lasers, lying on the same two curves: one for linewidth narrowing versus intracavity photon number and the other for g(2)(0) versus intracavity photon number.
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影响因子：
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作者：
DICKE, RH
通讯作者：
DICKE, RH
DOI：
10.1109/jstqe.2013.2246778
发表时间：
2013-07-01
影响因子：
4.9
作者：
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通讯作者：
Blood, Peter
影响因子：
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作者：
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影响因子：
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作者：
Chow, W. W.;Crawford, M. H.
通讯作者：
Crawford, M. H.
DOI：
10.1109/jstqe.2013.2258330
发表时间：
2013-07-01
影响因子：
4.9
作者：
Coldren, Larry A.
通讯作者：
Coldren, Larry A.