Photothermal atomic force microscopy (PT-AFM) enables us to examine non-radiative recombination property with high spatial resolution. In order to realize variable frequency modulation of incident light in PT-AFM, we have proposed a multi-pulse modulation method, where the duration for light illumination is divided into multiple light pulses and their period is varied. We have assessed the validity of the proposed method through acquisition of photothermal signal images on microcrystalline materials under various modulation frequencies.

中文翻译：

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光热原子力显微镜中用于入射光变频调制的多脉冲调制方法

光热原子力显微镜 (PT-AFM) 使我们能够以高空间分辨率检查非辐射复合特性。为了在 PT-AFM 中实现入射光的可变频率调制，我们提出了一种多脉冲调制方法，其中光照射的持续时间被分成多个光脉冲，它们的周期是变化的。我们通过在各种调制频率下获取微晶材料上的光热信号图像来评估所提出方法的有效性。