论文标题
超局压有机腔极化子中强度依赖性折射率的机制
Mechanisms of the Intensity Dependent Refractive Index in Ultrastrongly Coupled Organic Cavity Polaritons
论文作者
论文摘要
有机极化物质的非线性光学响应由于其增强和可控的非线性响应以及它们对新型光学设备（如紧凑型光子源以及光学和量子信息设备）的潜力而受到了越来越多的关注。使用Z-scans在不同的波长和入射力下，我们研究了下极化子带附近的超构造有机腔极化子的非线性光学分散体。我们表明，与无腔的有机膜相比，非线性响应的增强最多150倍，这是由于强度依赖性的极性共振频移（“ Blueshift”）。因此，我们发现这些Z-SCAN数据只能用强度的功率序列扩展的几个术语来描述，其强度各自的贡献取决于较低极性带的功率扩展和失调。我们进一步表明，可以通过三级分子量子模型定量描述非线性响应，该模型耦合到空腔，其中饱和度降低了狂犬病的分裂，从而考虑了下极化带的观察到的蓝光。
The nonlinear optical response of organic polaritonic matter has received increasing attention due to their enhanced and controllable nonlinear response and their potential for novel optical devices such as compact photon sources and optical and quantum information devices. Using z-scans at different wavelengths and incident powers we have studied the nonlinear optical dispersion of ultrastrongly coupled organic cavity polaritons near the lower polariton band. We show that the up to 150-fold enhancement of the nonlinear response compared to a cavity-less organic film arises from an intensity-dependent polaritonic resonant frequency shift ("blueshift"). Consequently, we find that these z-scan data can only be described by several terms of a power series expansion in intensity whose respective contributions depend on power broadening and detuning from the lower polariton band. We further show that the nonlinear response can be quantitatively described by a three-level molecular quantum model coupled to the cavity in which saturation reduces the Rabi splitting, thus accounting for the lower polariton band's observed blueshift.
