论文标题
通过次波长全dielectric腔的耳语库介导的相干耦合磁偶极发射器的强大超沉淀
Strong Superradiance of Coherently Coupled Magnetic Dipole Emitters Mediated by Whispering Gallery Modes of a Subwavelength All-Dielectric Cavity
论文作者
论文摘要
磁偶极子（MD）发射器和常见光子腔的相互作用通常很弱，这部分是由于磁腔的近磁近场增强。在这里，我们表明，次波长介电腔的耳语画廊模式（WGM）不仅可以极大地提高MD发射极的发射速率，而且还可以在相干MD发射器之间带来有效的耦合。在WGM腔中，单个发射极的最大发射速率（γmax）发生在野外模式的触觉上。根据WGM的磁场响应，MD发射极的发射也可能受到另一个连贯的发射。最大贡献也可以达到γmax。值得注意的是，由于WGM的高质量特征，相干MD发射器的合作发射率不会随距离范围内的距离而衰减。与发射相反，发射极的吸收几乎不受WGM介导的发射器之间的相干耦合的影响。发射和吸收的性能之间的差异与WGM的激发行为高度相关。我们的结果对于增强的磁光相互作用很重要。
The interaction of magnetic dipole (MD) emitters and common photonic cavities is usually weak, which is partially due to the low magnetic near field enhancements of the cavities. Here, we show that whispering gallery modes (WGMs) of a subwavelength dielectric cavity can not only greatly boost the emission rate of a MD emitter but also bring efficient couplings between coherent MD emitters. In a WGM cavity, the maximal emission rate (γmax) of a single emitter occurs at an antinode of the field pattern. The emission of the MD emitter can also be greatly affected by another coherent one depending on the magnetic field response of the WGM. The maximal contribution can also reach γmax. Notably, the cooperative emission rate of the coherent MD emitters does not decay with distance in the considered range due to the high-quality feature of a WGM. In contrast to the emission, the absorption of an emitter is hardly affected by the coherent couplings between emitters mediated by a WGM. The difference between the performances of emission and absorption is highly related to the excitation behaviors of WGMs. Our results are important for enhanced magnetic light-matter interactions.
