论文标题
磁性微腔中激子状态之间的长距离耦合和能量转移
Long-Distance Coupling and Energy Transfer between Exciton States in Magnetically Controlled Microcavities
论文作者
论文摘要
半导体中量子发射器的耦合通常依赖于短程偶极双极或电子交换类型相互作用。一致地，激子状态之间的能量转移，即通过库仑相互作用绑定的电子孔对，仅限于10〜nm的距离。在这里，我们演示了极化元素介导的耦合和激子状态之间的能量传递，距离超过2〜 $μ$ m。我们通过通过两个耦合光学微腔的离域模式将量子限制性激子耦合通过耦合量子良好的激子来实现这一目标。使用磁掺杂的量子井可以使我们通过磁场和这样控制传递的空间方向来调整限制的激子能量。相干耦合的量子发射器之间的这种受控的长距离相互作用开辟了基于固态，多腔系统的量子网络和量子模拟器的可扩展实现的可能性。
Coupling of quantum emitters in a semiconductor relies, generally, on short-range dipole-dipole or electronic exchange type interactions. Consistently, energy transfer between exciton states, that is, electron-hole pairs bound by Coulomb interaction, is limited to distances of the order of 10~nm. Here, we demonstrate polariton-mediated coupling and energy transfer between excitonic states over a distance exceeding 2~$μ$m. We accomplish this by coupling quantum well-confined excitons through the delocalized mode of two coupled optical microcavities. Use of magnetically doped quantum wells enables us to tune the confined exciton energy by the magnetic field and in this way to control the spatial direction of the transfer. Such controlled, long-distance interaction between coherently coupled quantum emitters opens possibilities of a scalable implementation of quantum networks and quantum simulators based on solid-state, multi-cavity systems.
