arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1911.00366quant-ph
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含量子点光子分子中的非常规光子阻塞

Unconventional Photon blockade in a Photonic Molecule Containing a Quantum Dot

Xiang Cheng, Han Ye, Zhongyuan Yu

摘要:

提出了一种在两个光子腔组成的光子分子中实现强光子反聚束和低光子非线性的方案,其中一个腔中含有一个量子点。这种强的光子反聚束归因于量子干涉效应的破坏性,它抑制了腔场的双光子激发。在单场驱动下,当量子点与腔的耦合强度g=1.1k,腔隧穿强度J= 3 k时,系统的量子点隧穿系数g^2(0)~10^(-4)。为了进一步减少所需的隧道效应并使系统可调谐,将两个激光场施加到系统。当J=0.9k时,通过优化两个驱动光场之间的相位,可以在较大的腔内光子数下实现强光子反聚束(g^2(0)~10^(-3))。此外,该系统表现出很强的鲁棒性,保持强的光子反聚束在一个大的参数变化下的最佳相位条件。我们的方案为固态量子单光子源提供了一种灵活有效的方法。

英文摘要:

We propose a scheme to realize strong photon antibunching with lower photon nonlinearity in a photonic molecule consisting of two photonic cavities, one of which contains a quantum dot (QD). This strong photon antibunching is attributed to destructive quantum interference effect which suppresses the two-photon excitation of the cavity field. That g^2 (0)~10^(-4) can be achieved with modest QD-cavity coupling strength g=1.1k and cavity tunneling strength J=3k when the system is driven by single laser field. To further reduce the requisite tunneling and make the system tunable, two laser fields are applied to the system. The strong photon antibunching (g^2 (0)~10^(-3)) can be achieved with a relatively large intracavity photon number by optimizing the phase between two driving laser fields when J=0.9k. Moreover, the system shows a strong robustness of maintaining strong photon antibunching within a large parameter variation under the optimal phase condition. Our scheme provides a flexible and efficient method for solid state quantum single photon sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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