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Nanoscale Coherent Light Source.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-06-26 , DOI: 10.1103/physrevlett.124.253603
Raphael Holzinger 1 , David Plankensteiner 1 , Laurin Ostermann 1 , Helmut Ritsch 1
Affiliation  

A laser is composed of an optical resonator and a gain medium. When stimulated emission dominates mirror losses, the emitted light becomes coherent. We propose a new class of coherent light sources based on wavelength sized regular structures of quantum emitters whose eigenmodes form high-Q resonators. Incoherent pumping of few atoms induces light emission with spatial and temporal coherence. We show that an atomic nanoring with a single gain atom at the center behaves like a thresholdless laser, featuring a narrow linewidth. Symmetric subradiant excitations provide optimal operating conditions.

中文翻译:

纳米级相干光源。

激光器由光谐振器和增益介质组成。当受激发射在反射镜损耗中占主导地位时,发射的光将变得相干。我们基于量子发射器的波长大小规则结构,提出了一种新的相干光源,其本征模形成高谐振器。少数原子的非相干泵浦会引起具有时空相干性的光发射。我们表明,在中心具有单个增益原子的原子纳米环的行为类似于无阈值激光,其线宽较窄。对称的次辐射激发提供了最佳的工作条件。
更新日期:2020-06-26
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