Ultrashort Pulse Generation in Nanolasers by Means of Lorenz–Haken Instabilities,Annalen Der Physik

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Ultrashort Pulse Generation in Nanolasers by Means of Lorenz–Haken Instabilities
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-07-03 , DOI: 10.1002/andp.202100122
Luis Cerdán ₁

Affiliation

Nearly half a century ago, the German physicist Hermann Haken proved that the laser dynamics could be described, under certain conditions, by the Lorenz equations, the paradigm of deterministic chaos. Unfortunately, its experimental realization has remained elusive for conventional laser materials and cavities mostly due to the extreme pumping conditions and the low cavity quality factors (“bad-cavity condition”) required to achieve Lorenz–Haken (L-H) self-pulsing dynamics upon continuous wave excitation. In this paper, it is theoretically proved that dielectric and plasmonic nanolasers, that can naturally fulfill the bad-cavity condition, may overcome the limitations of macroscopic cavities and make the observation of L-H instabilities in visible-IR solid-state materials become a reality. Remarkably, the adequate choice of active material and cavity design enables the generation of trains of ultrashort pulses in the sub-ps regime and with MHz–GHz repetition rates without the need of resorting to neither mode-locking nor Q-switching techniques. Thus, the results reported in this manuscript unveil a new paradigm in the generation of ultrashort pulses at the nanoscale.

中文翻译：

通过洛伦兹-哈肯不稳定性在纳米激光器中产生超短脉冲

近半个世纪前，德国物理学家赫尔曼·哈肯 (Hermann Haken) 证明，在特定条件下，可以通过洛伦兹方程（确定性混沌的范式）来描述激光动力学。不幸的是，它的实验实现对于传统的激光材料和腔来说仍然难以实现，这主要是由于极端的泵浦条件和低腔质量因子（“坏腔条件”）需要在连续的情况下实现 Lorenz-Haken（LH）自脉冲动力学。波激发。本文从理论上证明，可以自然满足坏腔条件的介电和等离子体纳米激光器可以克服宏观腔的局限性，使可见红外固态材料中 LH 不稳定性的观察成为现实。值得注意的是，充分选择的活性材料和腔设计能够在子PS制度中产生超短脉冲的火车，并具有MHz-GHz重复率，而无需借助锁定或Q开关技术。因此，本手稿中报告的结果揭示了纳米级超短脉冲生成的新范式。

更新日期：2021-07-03

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