In this work, the finite difference time domain (FDTD) method is used to optimize the multi-pixel sampling approach, in order to achieve ultra-high spatial resolution (∼ λ/110) in the near-field region. The optimization is performed based on the optical pump pulse wavelength, the thickness of the silicon modulator, and the size of the aperture in the projected pattern. To the best of our knowledge, this is the first time that the FDTD method has been used to improve near-field resolution. In addition, we consider the effect of pump wavelength on near field imaging resolution for the first time.

中文翻译：

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超亚波长分辨率太赫兹近场成像：通过FDTD方法在多像素采样方法中进行建模

在这项工作中，有限差分时域（FDTD）方法用于优化多像素采样方法，以便在近场区域中实现超高空间分辨率（〜λ / 110）。基于光泵浦脉冲波长，硅调制器的厚度以及投影图案中的孔径大小来执行优化。据我们所知，这是首次使用FDTD方法来提高近场分辨率。此外，我们首次考虑了泵浦波长对近场成像分辨率的影响。