论文标题
超级刺激使超级简单
Superoscillations Made Super Simple
论文作者
论文摘要
在通常的情况下，波浪中存在的最高频率是其傅立叶分解中的最高频率。但是，在波浪中可能存在一个空间或时间区域，该空间区域以更高的频率局部振荡，以一种被称为上苏西利的现象。超镜会在广泛的学科中找到应用，但目前它们的一代是基于难以实施的建设性方法。在这里，我们解决了这一点，利用了这样一个事实，即升级是破坏性干扰的产物，以产生从任意波形的叠加中产生超苏利的处方。作为该技术的首次测试，我们使用它来结合定期粘液液硅酸锂产生的四个THZ激光场。由此，我们能够在时间域中首次预测和观察。以这种方式生成超苏利的能力具有在各个领域的潜在应用。例如，它可能有助于实现量子控制所需的复杂脉冲，以及无需诉诸于非线性过程而产生的Attsond脉冲。
In ordinary circumstances the highest frequency present in a wave is the highest frequency in its Fourier decomposition. It is however possible for there to be a spatial or temporal region of the wave which locally oscillates at a still greater frequency, in a phenomenon known as superoscillation. Superoscillations find application in wide range of disciplines, but at present their generation is based upon constructive approaches which are difficult to implement. Here we address this, exploiting the fact that superoscillations are a product of destructive interference to produce a prescription for generating superoscillations from the superposition of arbitrary waveforms. As a first test of the technique, we use it to combine four THz laser fields generated by periodically poled Lithium Niobate. From this, we are able to predict and observe for the first time THz optical superoscillations in the temporal domain. The ability to generate superoscillations in this manner has potential application in a wide range of fields. It may for example contribute to the experimental realization of the complex pulses required by quantum control, and the generation of attosecond pulses without resorting to nonlinear processes.
