Department of Physics, Paderborn University, Warburger Strasse 100, D-33098 Paderborn, Germany.
Institute for Photonic Quantum Systems (PhoQS), Paderborn University, Warburger Strasse 100, D-33098 Paderborn, Germany.
Nano Lett. 2023 Apr 26;23(8):3196-3201. doi: 10.1021/acs.nanolett.2c04980. Epub 2023 Apr 17.
Dispersion is present in every optical setup and is often an undesired effect, especially in nonlinear-optical experiments where ultrashort laser pulses are needed. Typically, bulky pulse compressors consisting of gratings or prisms are used to address this issue by precompensating the dispersion of the optical components. However, these devices are only able to compensate for a part of the dispersion (second-order dispersion). Here, we present a compact pulse-shaping device that uses plasmonic metasurfaces to apply an arbitrarily designed spectral phase delay allowing for a full dispersion control. Furthermore, with specific phase encodings, this device can be used to temporally reshape the incident laser pulses into more complex pulse forms such as a double pulse. We verify the performance of our device by using an SHG-FROG measurement setup together with a retrieval algorithm to extract the dispersion that our device applies to an incident laser pulse.
在每个光学设置中都会存在色散，而且通常是一种不希望出现的效果，尤其是在需要超短激光脉冲的非线性光学实验中。通常，使用庞大的脉冲压缩器，由光栅或棱镜组成，通过预补偿光学元件的色散来解决这个问题。然而，这些设备只能补偿一部分色散（二阶色散）。在这里，我们提出了一种紧凑的脉冲整形装置，使用等离子体超表面来施加任意设计的光谱相位延迟，从而实现完全的色散控制。此外，通过特定的相位编码，该设备可用于将入射激光脉冲暂时整形为更复杂的脉冲形式，例如双脉冲。我们通过使用二次谐波频域相关光学回馈（SHG-FROG）测量装置和一个检索算法来验证我们设备的性能，该算法用于提取我们的设备对入射激光脉冲施加的色散。
