光学无序自旋玻璃相中光的赝自旋横向局域化
Pseudospin Transverse Localization of Light in an Optical Disordered Spin-Glass Phase
AI总结：
本文在非线性光子晶体的光学自旋玻璃类比中发现并实验验证了由无序矢量势引起的赝自旋横向局域化，揭示其非线性、非微扰本质及伴随的纵向退相干。
摘要：
输运过程中的局域化现象通常由无序标量势驱动。在这里，我们预测了一种由无序矢量势诱导的普适赝自旋局域化现象，并在经典无序自旋玻璃磁相的光学类比系统中进行了实验演示。在我们的系统中，非线性光子晶体二阶非线性耦合中的横向无序导致代表赝自旋流的闲频光-信号光束在横向平面内局域化。该效应强烈依赖于由光泵浦功率控制的非线性耦合强度，揭示了其内在的非线性和非微扰性质。此外，该现象以闲频场与信号场之间衰减的 Rabi 振荡为标志，并与无序性质相关，表明伴随存在纵向退相干效应。我们的研究结果为深入理解无序磁织构中的自旋输运提供了深刻见解，并为利用非线性光学探索复杂磁相和相变开辟了途径。
英文摘要：
Localization phenomena during transport are typically driven by disordered scalar potentials. Here, we predict a universal pseudospin localization phenomenon induced by a disordered vectorial potential and demonstrate it experimentally in an optical analogue of a classical disordered spin-glass magnetic phase. In our system, a transverse disorder in the second-order nonlinear coupling of a nonlinear photonic crystal causes the idler-signal light beam, representing the pseudospin current, to become localized in the transverse plane. This effect depends strongly on the nonlinear coupling strength, controlled by the optical pump power, revealing its inherently nonlinear and non-perturbative nature. Furthermore, this phenomenon is marked by decaying Rabi oscillations between the idler and signal fields, linked to the disorder properties, suggesting an accompanied longitudinal decoherence effect. Our findings offer deep insights into spin transport in disordered magnetic textures and open avenues for exploring complex magnetic phases and phase transitions using nonlinear optics.
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