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Approaching Upper Bounds to Resonant Nonlinear Optical Susceptibilities with Inverse-Designed Quantum Wells
ACS Photonics ( IF 6.5 ) Pub Date : 2025-01-21 , DOI: 10.1021/acsphotonics.4c01892
Hao Li, Theodoros T. Koutserimpas, Francesco Monticone, Owen D. Miller

We develop a unified framework for identifying bounds to maximum resonant nonlinear optical susceptibilities and for “inverse designing” quantum-well structures that can approach such bounds. In special cases (e.g., second-harmonic generation) we observe that known bounds, a variety of optimal design techniques, and previous experimental measurements nearly coincide. But for many cases (e.g., second-order sum-frequency generation, third-order processes), there is a sizable gap between the known bounds and previous optimal designs. We sharpen the bounds and use our inverse-design approach across a variety of cases, showing in each one that the inverse-designed QWs can closely approach the bounds. This framework allows for comprehensive understanding of maximum resonant nonlinearities, offering theoretical guidance for materials discovery as well as targets for computational design.

中文翻译:


使用逆向设计的量子阱接近谐振非线性光学敏感性的上限



我们开发了一个统一的框架,用于识别最大谐振非线性光学磁化率的边界,以及用于可以接近此类边界的“逆向设计”量子阱结构。在特殊情况下(例如,二次谐波生成),我们观察到已知边界、各种最优设计技术和以前的实验测量几乎一致。但对于许多情况(例如,二阶和频生成、三阶过程),已知边界与以前的最优设计之间存在相当大的差距。我们锐化边界并在各种情况下使用我们的逆向设计方法,在每种情况下都表明逆向设计的 QW 可以紧密接近边界。该框架允许全面理解最大谐振非线性,为材料发现提供理论指导,并为计算设计提供目标。
更新日期:2025-01-22
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