Ballantine K E, Ruostekoski J
Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom.
Phys Rev Lett. 2020 Oct 2;125(14):143604. doi: 10.1103/PhysRevLett.125.143604.
By utilizing strong optical resonant interactions in arrays of atoms with electric dipole transitions, we show how to synthesize collective optical responses that correspond to those formed by arrays of magnetic dipoles and other multipoles. Optically active magnetism with the strength comparable with that of electric dipole transitions is achieved in collective excitation eigenmodes of the array. By controlling the atomic level shifts, an array of spectrally overlapping, crossed electric and magnetic dipoles can be excited, providing a physical realization of a nearly reflectionless quantum Huygens' surface with the full 2π phase control of the transmitted light that allows for extreme wavefront engineering even at a single photon level. We illustrate this by creating a superposition of two different orbital angular momentum states of light from an ordinary input state that has no orbital angular momentum.
通过利用具有电偶极跃迁的原子阵列中的强光学共振相互作用，我们展示了如何合成与由磁偶极子和其他多极子阵列形成的集体光学响应相对应的集体光学响应。在阵列的集体激发本征模中实现了强度与电偶极跃迁相当的光学活性磁性。通过控制原子能级移动，可以激发光谱重叠的交叉电偶极子和磁偶极子阵列，从而实现近乎无反射的量子惠更斯表面的物理实现，对透射光具有完整的2π相位控制，即使在单光子水平也能实现极端的波前工程。我们通过从没有轨道角动量的普通输入状态创建两种不同的光轨道角动量状态的叠加来说明这一点。
