Delayed formation of coherence in the emission dynamics of high-Q nanolasers
Delayed formation of coherence in the emission dynamics of high-Q nanolasers
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DOI：
10.1364/optica.5.000395
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发表时间：
2018-03
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影响因子：
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通讯作者：
G. Moody;Mawussey Segnon;I. Sagnes;R. Braive;A. Beveratos;I. Robert-Philip;N. Belabas;F. Jahnke;K. Silverman;R. Mirin;M. Stevens;C. Gies
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文献类型：
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作者：
G. Moody;Mawussey Segnon;I. Sagnes;R. Braive;A. Beveratos;I. Robert-Philip;N. Belabas;F. Jahnke;K. Silverman;R. Mirin;M. Stevens;C. Gies
在超小型半导体激光器的实现中，腔QED效应被用来增强自发辐射，并使激光阈值与仅来自少数固态发射器的增益贡献交叉。在这种制度下的操作促进了相关效应，特别是在纳米激光器的发射动力学中留下了它们的指纹。使用时间分辨光子相关光谱，我们表明，在量子点光子晶体纳米激光发射的电信波段，与激光相关的二阶相干建立在不同的时间尺度比发射本身。通过将测量与微观半导体激光器理论相结合，我们将起源归因于载流子-光子相关性，这些相关性在发射动力学中引起了激光速率方程理论未捕获的非马尔可夫效应。我们的研究结果有直接的影响，相对于调制响应，重复率，噪声特性，和相干特性的纳米激光器的设备应用。
In the realization of ultrasmall semiconductor lasers, cavity-QED effects are used to enhance spontaneous emission and enable the lasing threshold to be crossed with gain contributions from only a few solid-state emitters. Operation in this regime fosters correlation effects that leave their fingerprint especially in the emission dynamics of nanolasers. Using time-resolved photon-correlation spectroscopy, we show that in a quantum-dot photonic-crystal nanolaser emitting in the telecom band, second-order coherence associated with lasing is established on a different timescale than the emission itself. By combining measurements with a microscopic semiconductor laser theory, we attribute the origin to carrier-photon correlations that give rise to non-Markovian effects in the emission dynamics that are not captured by laser rate-equation theories. Our results have direct implications with respect to the modulation response, repetition rate, noise characteristics, and coherence properties of nanolasers for device applications.