Two-Photon Blockade with Second-Order Nonlinearity in Cavity Systems
Two-Photon Blockade with Second-Order Nonlinearity in Cavity Systems
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DOI：
10.1007/s10773-022-05024-x
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发表时间：
2022-02
影响因子：
1.4
通讯作者：
Qi‐Cheng Wu;Xingyuan Zhang;Yue-Ming Wang-;Tongqi Liu;Yan-Hui Zhou;H. Shen;Chuiping Yang
中科院分区：
文献类型：
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作者：
Qi‐Cheng Wu;Xingyuan Zhang;Yue-Ming Wang-;Tongqi Liu;Yan-Hui Zhou;H. Shen;Chuiping Yang
随着单光子封锁技术的发展，双光子和多光子封锁成为近年来的研究热点。然而，我们注意到，对双光子和多光子阻挡的研究主要集中在与原子强耦合的光腔系统或克尔非线性。本文研究了二阶非线性系统中的双光子阻塞。我们发现，在相干光驱动基模的情况下，二次谐模可以获得较强的双光子阻挡，而二次谐模的驱动不会产生双光子阻挡，这一现象可以从不同驱动因素的有效能级来解释。与其他光子封锁方案不同，由于该系统的性质，基模中的单光子封锁和二次谐波中的双光子封锁同时存在。
Two-photon and multi-photon blockade have become the research focus recently with the development of single-photon blockade. However, we notice that the study of the two-photon and multi-photon blockades has mainly focused on the systems of an optical cavity strongly coupled to the atoms or the Kerr nonlinearity. In this paper, we study the two-photon blockade in a second-order nonlinear system. We find that a strong two-photon blockade can be obtained in the second-harmonic mode with a coherent light driving to the fundamental mode, while the drive of second-harmonic mode will not give rise to the two-photon blockade, this phenomenon is explained from the effective energy levels enabled by different drivers. Different from the other schemes of photon blockade, the single-photon blockade in the fundamental mode and two-photon blockade in the second-harmonic mode exist simultaneously due to the nature of this system.