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We combine near-field microscopy with ultrafast time-resolved spectroscopy. By combining these two techniques, local carrier cooling and relaxation processes can be measured with submicron spatial resolution, shedding light on their relationship to the microstructure in these materials. The first step in making these kinds of measurements is to characterize the measurement technique. NSOM measurements...
Although the advance of near field optics gives us the ability to achieve sub-wavelength resolution in microscopy, so far its application to chemistry and biology has been mostly limited to fluorescence imaging. In this study we propose a new method, namely using the non-linear near field optics properties to study the material interactions directly, by wave-mixing the near field and the external...
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