The single-photon blockade effect arising in a cavity containing a quantum well and interacting with squeezed light, resulting from a down-conversion process through a nonlinear medium, is investigated. Optical parametric oscillator (OPO) materials with positive and negative second-order susceptibilities are considered. By solving the master equation analytically in the weak-driving limit and calculating the second-order equal-time correlation function, it is found that strong photon antibunching can be achieved in this system with weak excitonic nonlinearity or squeezed light via a destructive quantum interference mechanism. The optimal conditions for the photon blockade are derived analytically and discussed in details. Unlike the excitonic nonlinearity, a strong photon blockade occurs with the squeezed light at total or quasitotal resonance, even in the weak coupling regime, using an OPO material with negative second-order nonlinear susceptibility. By acting on the driving coherent pump frequency, the control of the cavity output is achieved and the scheme can serve as a tunable single-photon emission source.

中文翻译：

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压缩光量子阱微腔中的非常规光子阻断

研究了在包含量子阱的腔中产生的单光子阻塞效应，并与压缩光相互作用，这是通过非线性介质的下转换过程产生的。考虑了具有正负二阶磁化率的光学参量振荡器 (OPO) 材料。通过在弱驱动极限下解析求解主方程并计算二阶等时相关函数，发现在具有弱激子非线性或压缩光的系统中，可以通过破坏性量子干涉机制实现强光子反聚束. 对光子封锁的最佳条件进行了分析和详细讨论。与激子非线性不同，在全谐振或准全谐振下，压缩光会发生强光子阻塞，即使在弱耦合状态下，使用具有负二阶非线性磁化率的 OPO 材料。通过作用于驱动相干泵浦频率，实现了腔体输出的控制，该方案可以作为可调谐的单光子发射源。