Lake David P, Mitchell Matthew, Sanders Barry C, Barclay Paul E
Department of Physics and Astronomy and Institute for Quantum Science and Technology, University of Calgary, Calgary, AB, T2N 1N4, Canada.
Nat Commun. 2020 May 5;11(1):2208. doi: 10.1038/s41467-020-15625-x.
Efficient switching and routing of photons of different wavelengths is a requirement for realizing a quantum internet. Multimode optomechanical systems can solve this technological challenge and enable studies of fundamental science involving widely separated wavelengths that are inaccessible to single-mode optomechanical systems. To this end, we demonstrate interference between two optomechanically induced transparency processes in a diamond on-chip cavity. This system allows us to directly observe the dynamics of an optomechanical dark mode that interferes photons at different wavelengths via their mutual coupling to a common mechanical resonance. This dark mode does not transfer energy to the dissipative mechanical reservoir and is predicted to enable quantum information processing applications that are insensitive to mechanical decoherence. Control of the dark mode is also utilized to demonstrate all-optical, two-colour switching and interference with light separated by over 5 THz in frequency.
实现量子互联网需要对不同波长的光子进行高效的切换和路由。多模光机械系统可以解决这一技术挑战，并能够开展涉及单模光机械系统无法实现的、波长相距甚远的基础科学研究。为此，我们展示了金刚石片上腔中两个光机械诱导透明过程之间的干涉。该系统使我们能够直接观测光机械暗模式的动力学，该暗模式通过与共同的机械共振相互耦合来干涉不同波长的光子。这种暗模式不会将能量转移到耗散性的机械库中，预计可实现对机械退相干不敏感的量子信息处理应用。对暗模式的控制还被用于演示全光、双色切换以及对频率间隔超过5太赫兹的光的干涉。
