Plankensteiner David, Sommer Christian, Ritsch Helmut, Genes Claudiu
Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21a, A-6020 Innsbruck, Austria.
Max Planck Institute for the Science of Light, Staudtstraße 2, D-91058 Erlangen, Germany.
Phys Rev Lett. 2017 Sep 1;119(9):093601. doi: 10.1103/PhysRevLett.119.093601. Epub 2017 Aug 31.
An array of N closely spaced dipole coupled quantum emitters exhibits super- and subradiance with characteristic tailorable spatial radiation patterns. Optimizing the emitter geometry and distance with respect to the spatial profile of a near resonant optical cavity mode allows us to increase the ratio between light scattering into the cavity mode and free space emission by several orders of magnitude. This leads to distinct scaling of the collective coherent emitter-field coupling vs the free space decay as a function of the emitter number. In particular, for subradiant states, the effective cooperativity increases much faster than the typical linear ∝N scaling for independent emitters. This extraordinary collective enhancement is manifested both in the amplitude and the phase profile of narrow collective antiresonances appearing at the cavity output port in transmission spectroscopy.
由N个紧密间隔的偶极耦合量子发射器组成的阵列呈现出具有可定制特征空间辐射模式的超辐射和亚辐射。根据近共振光学腔模的空间分布优化发射器的几何形状和间距，能使进入腔模的光散射与自由空间发射之间的比率提高几个数量级。这导致集体相干发射器 - 场耦合与自由空间衰减的明显缩放关系，该关系是发射器数量的函数。特别是对于亚辐射态，有效协同性的增加比独立发射器典型的线性∝N缩放快得多。这种非凡的集体增强在透射光谱中腔输出端口出现的窄集体反共振的幅度和相位分布中都有体现。
