Dynamic hysteresis in a coherent high-β nanolaser
Dynamic hysteresis in a coherent high-β nanolaser
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DOI：
10.1364/optica.3.001260
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发表时间：
2016-11-20
期刊：
影响因子：
10.4
通讯作者：
Fainman, Yeshaiahu
中科院分区：
文献类型：
--
作者：
Pan, Si Hui;Gu, Qing;Fainman, Yeshaiahu
对高性能光子电路的高能量效率和快速调制的集成光源的追求导致了具有高自发辐射因子a的室温通信波长纳米激光器的发展。由于测量曲线的扭折减小，使用传统的输出光强与输入泵浦强度的测量来表征这类激光器的相干性是固有的困难。我们证明了高a脉冲泵浦金属介电纳米激光器从非相干发射到相干发射的转变可以通过检测二阶强度相关峰的宽度来确定，该峰在阈值以下收缩和在阈值以上展宽。我们的光子涨落研究首次报道了这种类型的纳米激光器，证实了这种测量技术的有效性。此外，我们还证明了阈值以上的宽度变化是由延迟阈值现象引起的，首次观察到了纳米激光器中的动态滞后现象。(C)2016年度美国光学学会
The quest for an integrated light source that promises high energy efficiency and a fast modulation for high-performance photonic circuits has led to the development of room-temperature telecom-wavelength nanoscale lasers with a high spontaneous emission factor a. The coherence characterization of this type of laser using the conventional measurement of output light intensity versus input pump intensity is inherently difficult due to the diminishing kink in the measurement curve. We demonstrate that the transition from incoherent to coherent emission of a high-a pulse-pump metallo-dielectric nanolaser can be determined by examining the width of a second-order intensity correlation peak that shrinks below and broadens above the threshold. Our photon fluctuation study, the first ever reported for this type of nanolaser, confirms the validity of this measurement technique. Additionally, we show that the width variation above the threshold results from the delayed threshold phenomenon, providing the first observation of dynamical hysteresis in a nanolaser. (C) 2016 Optical Society of America