Cooperative optical wavefront engineering with atomic arrays
Cooperative optical wavefront engineering with atomic arrays
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DOI：
10.1515/nanoph-2021-0059
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发表时间：
2021-05-01
期刊：
影响因子：
7.5
通讯作者：
Ruostekoski, Janne
中科院分区：
文献类型：
--
作者：
Ballantine, Kyle E.;Ruostekoski, Janne
天然材料通常与光的磁性成分相互作用很弱，这大大限制了它们的应用。这导致了人造超材料和超表面的发展。然而，自然的原子，其中只有电偶极跃迁是相关的光学频率，可以合作地响应于光，形成集体激发与强磁，以及电，相互作用连同相应的电和磁镜反射特性。通过结合的电和磁集体自由度，我们表明，平面阵列的原子可以被利用作为原子透镜聚焦光的亚波长点在衍射极限，以不同的角度转向光允许光学分选，并作为不同的角动量状态之间的转换器。该方法基于相干叠加感应电偶极子和磁偶极子来设计量子纳米光子惠更斯原子表面，对传输进行完全2 π相位控制，反射接近零。
Natural materials typically interact weakly with the magnetic component of light which greatly limits their applications. This has led to the development of artificial metamaterials and metasurfaces. However, natural atoms, where only electric dipole transitions are relevant at optical frequencies, can cooperatively respond to light to form collective excitations with strong magnetic, as well as electric, interactions together with corresponding electric and magnetic mirror reflection properties. By combining the electric and magnetic collective degrees of freedom, we show that ultrathin planar arrays of atoms can be utilized as atomic lenses to focus light to subwavelength spots at the diffraction limit, to steer light at different angles allowing for optical sorting, and as converters between different angular momentum states. The method is based on coherently superposing induced electric and magnetic dipoles to engineer a quantum nanophotonic Huygens' surface of atoms, giving full 2 pi phase control over the transmission, with close to zero reflection.