Zhao Yue, Fuji Takao
Opt Lett. 2022 Jun 15;47(12):2999-3002. doi: 10.1364/OL.460742.
We present a new, to the best of our knowledge, approach for the measurement of the localized electric field distribution in air using electric field induced second harmonic generation combined with a microscopic imaging technique. This method only needs two snapshot second harmonic images with orthogonal polarizations to obtain the two-dimensional spatial distribution of the intensity and direction of the electric field. The distribution of a local electric field was clearly measured with a spatial resolution of 8.8 µm by using this method. The measurement of a single second harmonic image takes 5 s by using a 5 kHz repetition rate femtosecond laser.
据我们所知，我们提出了一种新方法，用于利用电场诱导二次谐波产生结合显微成像技术测量空气中的局部电场分布。该方法仅需两幅具有正交偏振的二次谐波快照图像，即可获得电场强度和方向的二维空间分布。使用该方法，以8.8 µm的空间分辨率清晰地测量了局部电场的分布。使用重复频率为5 kHz的飞秒激光时，单次二次谐波图像的测量时间为5 s。
