腔光机械系统中的非常规光子阻挡

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-10-08 DOI:10.1063/5.0289640

Zhong Ding, Yong Zhang

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引用次数: 0

摘要

传统上，光子阻塞（PB）基于其独特的物理机制被分为两种截然不同的类别-常规和非常规。对于腔衰减率κ，在强非线性条件下（J>κ）发生常规光子阻断，而在弱非线性条件下（J<κ）发生非常规光子阻断。在这项研究中，我们研究了一个双模腔光机械系统（j††b+ j b†）和一个双光子参数驱动εp（††+ ）。当失谐显著超过空腔的耗散率（|Δa|，|Δb|比κ）时，PB的最佳条件与耦合强度无关。这意味着光子反聚束效应可以发生在强和弱状态（J>；κ和J&；lt;κ）中，即使是J ~ κ，我们也可以通过调整失谐来实现PB。此外，我们将该方法推广到三光子参数驱动εp（†3+ 3）下单光子与三光子（j†3b+ j 3b³）之间的转换，得到了几乎相同的结论。这项工作提出了一种实现单光子源的方法，由于其不依赖于耦合强度，因此在实际工程应用中具有重要的潜力。

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Unconventional photon blockade in cavity optomechanical system

Traditionally, photon blockades (PB) are classified into two distinct categories—conventional and unconventional—based on their unique physical mechanisms. In relation to the cavity decay rate κ, conventional photon blockade occurs under conditions of strong nonlinearity (J>κ), while unconventional photon blockade is observed in situations of weak nonlinearity (J<κ). In this study, we examine a two-mode cavity optomechanical system (Jâ†â†b+Jââb̂†) and a two-photon parametric drive εp(â†â†+ââ). When the detunings significantly exceed the dissipation rates of the cavity (|Δa|,|Δb|≫κ), the optimal condition for PB becomes independent of the coupling strength. This implies that photon antibunching effects can occur in both strong and weak regimes (J>κ and J<κ), even when J∼κ, and we could achieve PB solely through the adjustment of detunings. Furthermore, we generalize the approach to the conversion between single photon and three photons (Jâ†3b+Jâ3b̂†) with a three-photon parametric drive εp(â†3+â3) and arrive at nearly identical conclusions. This work presents a method for implementing a single-photon source, which holds significant potential for practical engineering applications due to its independence from coupling strength.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.