论文标题
用短激光脉冲来表征复杂随机介质的自洽量子场理论
Self-Consistent Quantum-Field Theory for the Characterization of Complex Random Media by Short Laser Pulses
论文作者
论文摘要
我们提出了一种量子场理论方法，用于在光学相干断层扫描设置（OCT）中以短激光脉冲（OCT）中用短激光脉冲表征无序的复杂培养基。我们使用加权基本上非振荡方法（WENO）解决了在时空中连贯运输的方案。 WENO优先用于确定高度非线性和不连续的过程，包括干扰效应和诸如光线定位之类的相变。该理论决定了散射平均自由路径的时空特征和在飞行时间（TOF）和泵探针实验中直接测量的传输横截面。结果是在被动以及光学柔软的随机介质中的多个散射光子相干性的量度。我们对TOF的理论结果在光谱区域具有启发性，在这些频谱区域中，诸如散射均值自由路径和扩散系数之类的物质特征在方法论上几乎对增益或吸收不敏感以及对高阶非线性效应。我们的方法适用于OCT和其他晚期光谱设置，包括强烈散射的单和多分散复合纳米和微孔子的样品。
We present a quantum field theoretical method for the characterization of disordered complex media with short laser pulses in an optical coherence tomography setup (OCT). We solve this scheme of coherent transport in space and time with weighted essentially nonoscillatory methods (WENO). WENO is preferentially used for the determination of highly nonlinear and discontinuous processes including interference effects and phase transitions like Anderson localization of light. The theory determines spatiotemporal characteristics of the scattering mean free path and the transmission cross section that are directly measurable in time-of-flight (ToF) and pump-probe experiments. The results are a measure of the coherence of multiple scattering photons in passive as well as in optically soft random media. Our theoretical results of ToF are instructive in spectral regions where material characteristics such as the scattering mean free path and the diffusion coefficient are methodologically almost insensitive to gain or absorption and to higher-order nonlinear effects. Our method is applicable to OCT and other advanced spectroscopy setups including samples of strongly scattering mono- and polydisperse complex nano- and microresonators.
