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arXiv 2005.13325physics.optics
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电子强耦合下的大光学非线性增强

Large optical nonlinearity enhancement under electronic strong coupling

Kuidong Wang, Marcus Seidel, Kalaivanan Nagarajan, Thibault Chervy, Cyriaque Genet, Thomas W. Ebbesen

摘要:

非线性光学响应为理解激光场与物质之间的微观相互作用提供了强有力的途径。它们对于许多应用至关重要,例如激光器、集成光子电路、生物传感和医疗工具。然而,大多数材料在与强光场相互作用时表现出弱的光学非线性或长的响应时间。在这里,我们将有机分子的激子强耦合到Fabry-Perot腔的光学模式,并实现了非线性复折射率比未耦合条件下提高了两个数量级。此外,耦合系统显示出我们从光学互相关测量中提取的~120 fs的超快响应。在这项工作中的非线性系数的超快和大的增强铺平了道路,探索各种三阶非线性光学现象的强耦合效应和技术应用。

英文摘要:

Nonlinear optical responses provide a powerful way to understand the microscopic interactions between laser fields and matter. They are critical for plenty of applications, such as in lasers, integrated photonic circuits, biosensing and medical tools. However, most materials exhibit weak optical nonlinearities or long response times when they interact with intense optical fields. Here, we strongly couple the exciton of organic molecules to an optical mode of a Fabry-Perot cavity, and achieve an enhancement of the nonlinear complex refractive index by two orders of magnitude compared with that of the uncoupled condition. Moreover, the coupled system shows an ultrafast response of ~120 fs that we extract from optical cross-correlation measurements. The ultrafast and large enhancement of the nonlinar coefficients in this work paves the way for exploring strong coupling effects on various third-order nonlinear optical phenomena and for technological applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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