Adams M J, Jevtics D, Strain M J, Henning I D, Hurtado A
School of Computer Science and Electronic Engineering, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK.
Institute of Photonics, SUPA Department of Physics, University of Strathclyde, TIC Centre, 99 George Street, Glasgow, G1 1RD, UK.
Sci Rep. 2019 Apr 16;9(1):6126. doi: 10.1038/s41598-019-42526-x.
We analyse the dynamics and conditions for stability in an array of two laterally-coupled nanowire lasers in terms of their separation, difference in resonant frequencies and pumping rate under conditions of weak coupling. We find that the regions of stability are very small and are found close to zero frequency offset between the lasers. Outside these regions various forms of instability including periodic oscillation, chaos and complex dynamics are predicted. Importantly, the analysis of the frequency of periodic oscillations for realistic laser separations and pumping yields values of order 100 GHz thus underlining the significant potential of nanowire laser arrays for ultra-high frequency on-chip systems with very low foot-print and energy requirements.
我们根据两个横向耦合纳米线激光器阵列的间距、共振频率差异和泵浦速率，在弱耦合条件下分析了其动力学和稳定性条件。我们发现，稳定区域非常小，且出现在激光器之间频率偏移接近零的情况下。在这些区域之外，预测会出现各种形式的不稳定性，包括周期性振荡、混沌和复杂动力学。重要的是，对于实际的激光器间距和泵浦情况，对周期性振荡频率的分析得出了约100 GHz量级的值，从而突出了纳米线激光器阵列在具有非常小的占地面积和能量需求的超高频片上系统中的巨大潜力。
