Nondissipative non-Hermitian dynamics and exceptional points in coupled optical parametric oscillators
Nondissipative non-Hermitian dynamics and exceptional points in coupled optical parametric oscillators
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DOI：
10.1364/optica.415569
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发表时间：
2020-09
期刊：
影响因子：
10.4
通讯作者：
Arkadev Roy;Saman Jahani;Q. Guo;A. Dutt;S. Fan;M. Miri;A. Marandi
中科院分区：
文献类型：
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作者：
Arkadev Roy;Saman Jahani;Q. Guo;A. Dutt;S. Fan;M. Miri;A. Marandi
具有特殊点的工程非厄米特系统可以导致从光子学，声学，光力学，电子学到原子物理学等不同领域的许多非凡现象。在这里，我们介绍和目前的非厄米动力学耦合光学参量振荡器（OPO）所产生的相敏放大和去放大，并显示其独特的优势，传统的非厄米系统依赖于激光增益和损耗。基于OPO的非厄米系统可以受益于参数增益的瞬时性质、无噪声相敏放大以及丰富的量子和经典非线性动力学。我们发现，两个耦合的OPO可以表现出光谱反PT对称性和一个例外点之间的简并和非简并操作制度。为了证明耦合OPO系统与传统非厄米特系统相比的独特潜力，我们提出了具有两个OPO的高阶例外点，可调Floquet例外点在可重构动态非厄米特系统中，以及在例外点周围产生压缩真空，所有这些都不容易在其他非厄米特平台中实现。我们的研究结果表明，耦合OPO是一个杰出的非厄米特设置与前所未有的机会，在实现非线性动力学系统增强传感和量子信息处理。
Engineered non-Hermitian systems featuring exceptional points can lead to a host of extraordinary phenomena in diverse fields ranging from photonics, acoustics, opto-mechanics, electronics, to atomic physics. Here we introduce and present non-Hermitian dynamics of coupled optical parametric oscillators (OPOs) arising from phase-sensitive amplification and de-amplification, and show their distinct advantages over conventional non-Hermitian systems relying on laser gain and loss. OPO-based non-Hermitian systems can benefit from the instantaneous nature of the parametric gain, noiseless phase-sensitive amplification, and rich quantum and classical nonlinear dynamics. We show that two coupled OPOs can exhibit spectral anti-PT symmetry and an exceptional point between its degenerate and non-degenerate operation regimes. To demonstrate the distinct potentials of the coupled OPO system compared to conventional non-Hermitian systems, we present higher-order exceptional points with two OPOs, tunable Floquet exceptional points in a reconfigurable dynamic non-Hermitian system, and generation of squeezed vacuum around exceptional points, all of which are not easy to realize in other non-Hermitian platforms. Our results show that coupled OPOs are an outstanding non-Hermitian setting with unprecedented opportunities in realizing nonlinear dynamical systems for enhanced sensing and quantum information processing.