So far, exciton-polariton (polariton) lasers were mostly single-mode lasers based on microcavities. Despite the large repulsive polariton-polariton interaction, a pulsed mode-locked polariton laser was never, to our knowledge, reported. Here, we use a 60-µm-long GaN-based waveguide surrounded by distributed Bragg reflectors forming a multi-mode horizontal cavity. We demonstrate experimentally and theoretically a polariton mode-locked micro-laser operating in the blue-UV, at room temperature, with a 300 GHz repetition rate and 100-fs-long pulses. The mode-locking is demonstrated by the compensation (linearization) of the mode dispersion by the self-phase modulation induced by the polariton-polariton interaction. It is also supported by the observation in experiment and theory of the typical envelope frequency profile of a bright soliton.

中文翻译：

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锁模波导偏振子激光器


迄今为止，激子极化（极化子）激光器大多是基于微腔的单模激光器。尽管存在较大的排斥极化子-极化子相互作用，但据我们所知，从未报道过脉冲锁模极化子激光器。在这里，我们使用 60 µm 长的 GaN 基波导，周围环绕分布式布拉格反射器，形成多模水平腔。我们通过实验和理论上证明了偏振子锁模微型激光器在室温下在蓝色紫外光下工作，具有 300 GHz 重复率和 100 fs 长脉冲。锁模通过由极化子-极化子相互作用引起的自相位调制对模式色散的补偿（线性化）来证明。它也得到了亮孤子典型包络频率分布的实验和理论观察的支持。