近日，瑞士日内瓦大学的R. Thew课题组与瑞士洛桑联邦理工学院的T. J. Kippenberg以及美国普渡大学的S. A. Bhave等人合作，经过不懈努力，成功研制了具有单片压电频率可调性的集成光子对光源。相关研究成果已于2023年5月3日在国际知名学术期刊《物理评论A》上发表。
这项研究研制了一种在通信波长下的基于光子集成Si3N4微腔的纠缠光子对光源，具备单片集成压电频率调谐的能力。以往，只有通过热控制证实微腔产生的光子对具有频率调谐能力，但其作用带宽有限，且不适用于低温环境。此外，还发现了一种单片集成氮化铝层的Si3N4微腔，可实现可调频光子对的产生，并验证了该微腔快速锁定到外部激光的能力。相比使用热锁定的报道值，该锁定带宽高出几个数量级。
这些能力未来将直接应用于与基于俘获离子或稀土离子方案的量子存储器接口的方案中。
附：英文原文
Title: Integrated photon-pair source with monolithic piezoelectric frequency tunability
Author: T. Brydges, A. S. Raja, A. Gelmini, G. Lihachev, A. Petitjean, A. Siddharth, H. Tian, R. N. Wang, S. A. Bhave, H. Zbinden, T. J. Kippenberg, R. Thew
Issue&Volume: 2023/05/03
Abstract: This work demonstrates the capabilities of an entangled photon-pair source at telecom wavelengths, based on a photonic integrated Si3N4 microresonator with monolithically integrated piezoelectric frequency tuning. Previously, frequency tuning of photon pairs generated by microresonators has only been demonstrated using thermal control, however these have limited actuation bandwidth and are not compatible with cryogenic environments. Here, the frequency-tunable photon-pair generation capabilities of a Si3N4 microresonator with a monolithically integrated aluminium nitride layer are shown. Fast-frequency locking of the microresonator to an external laser is demonstrated, with a resulting locking bandwidth orders of magnitude larger than reported previously using thermal locking. These abilities will have direct application in future schemes which interface such sources with quantum memories based on, e.g., trapped-ion or rare-earth-ion schemes.
DOI: 10.1103/PhysRevA.107.052602
Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.107.052602
Physical Review A：《物理评论A》，创刊于1970年。隶属于美国物理学会，最新IF：2.97
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