论文标题
纳米级相干光源
A Nanoscale Coherent Light Source
论文作者
论文摘要
通常，激光由与增益介质耦合的光谐振器组成。如果通过刺激发射的光放大占主导地位的镜像损失，则发射光是连贯的。最近的研究表明，量子发射器的次波长大小的环具有模仿高Q光学谐振器的次级征征。我们在环的中心中添加一个连续泵送的原子作为增益介质，从而产生了简约的相干光源。该系统的行为就像是无阈值激光器，其狭窄的线宽远低于组成原子的自然线宽。
Generically, a laser is composed of an optical resonator coupled to a gain medium. If the light amplification via stimulated emission dominates the mirror losses, the emitted light is coherent. Recent studies have shown that sub-wavelength sized rings of quantum emitters possess subradiant eigenmodes which mimic high-Q optical resonators. We add a continuously pumped atom as a gain medium in the ring's center creating a minimalistic coherent light source. The system behaves like a thresholdless laser, featuring a narrow linewidth well below the natural linewidth of the constituent atoms.
