非线性腔中的非互易性和零反射
Non-reciprocity and zero reflection in nonlinear cavities with tailored loss
摘要：
我们演示了如何定制的非线性腔的损耗，以抑制其反射和增强其非互易传输。我们推导出预测存在的零反射通道在单一和耦合的非线性腔，依赖于驱动频率和损耗率的解析表达式。虽然抑制从一个单一的腔的反射施加了严格的条件上的输入-输出泄漏率，我们表明，这个条件可以显着放宽耦合腔系统。特别是，零反射和非互易性，可以通过单独调谐输出泄漏率在耦合腔的驱动频率范围内实现。基于常用于描述微腔极化激元的驱动耗散Gross-Pitaevksii方程的数值计算，揭示了与零反射态相关的空间现象，为非线性光隔离器的设计提供了指导.
英文摘要：
We demonstrate how to tailor the losses of nonlinear cavities in order to suppress their reflection and enhance their non-reciprocal transmission. We derive analytical expressions predicting the existence of zero-reflection channels in single and coupled nonlinear cavities, depending on the driving frequency and loss rates. While suppressing the reflection from a single cavity imposes a stringent condition on the input-output leakage rates, we demonstrate that this condition can be significantly relaxed in systems of coupled cavities. In particular, zero-reflection and non-reciprocity can be achieved across a range of driving frequencies in coupled cavities by tuning the output leakage rate alone. Numerical calculations based on the driven-dissipative Gross-Pitaevksii equation, usually employed to describe microcavity polaritons, reveal the spatial phenomenology associated with zero-reflection states and provide design guidelines for the construction of nonlinear optical isolators.
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