二阶非线性双谐振微腔中的非常规光子阻塞
Unconventional photon blockade in doubly resonant microcavities with second-order nonlinearity
摘要：
结果表明，非中心对称材料与散装二阶非线性极化率可以用来产生强烈的反聚束辐射在任意波长，仅由适当的工程耦合微腔的谐振行为确定。所提出的方案利用了非常规的光子阻塞的相干驱动场在耦合腔系统的输入，其中两个腔之一被设计为在基波和二次谐波频率，分别谐振。值得注意的是，非常规阻塞机制在两个谐波处以合理低的品质因数发生，并且不需要第二腔的尖锐双谐振条件，从而证明其在当前半导体技术下的可行性。
英文摘要：
It is shown that non-centrosymmetric materials with bulk second-order nonlinear susceptibility can be used to generate strongly antibunched radiation at an arbitrary wavelength, solely determined by the resonant behavior of suitably engineered coupled microcavities. The proposed scheme exploits the unconventional photon blockade of a coherent driving field at the input of a coupled cavity system, where one of the two cavities is engineered to resonate at both fundamental and second harmonic frequencies, respectively. Remarkably, the unconventional blockade mechanism occurs with reasonably low quality factors at both harmonics, and does not require a sharp doubly-resonant condition for the second cavity, thus proving its feasibility with current semiconductor technology.
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