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FEL microscopy for the investigation of transient local heating in single living cells

机译:FEL显微镜用于研究单个活细胞中的瞬时局部加热

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Abstract: A free-electron laser (FEL) microscope has been constructed to perform spatially and spectrally resolved pump/probe experiments in single living cells. Picosecond infrared FEL pulses are absorbed by the sample and rapidly converted to heat. Excitation of localized fluorescent reporter molecules using a UV/VIS probe beam leads to thermally induced alterations in the radiative signal. Fluorescence-detected infrared (FDIR) spectra are generated from regions proximal to reporter molecules by varying the FEL pump wavelength. Sub- wavelength spatial resolution is a composite function of media thermal properties and probe selectivity. !10
机译:摘要:建立了自由电子激光(FEL)显微镜,以在单个活细胞中进行空间和光谱分辨的泵浦/探针实验。皮秒红外FEL脉冲被样品吸收,并迅速转化为热量。使用UV / VIS探测光束激发局部荧光报告分子会导致热诱导辐射信号发生变化。通过改变FEL泵浦波长,从报告分子附近的区域产生荧光检测的红外(FDIR)光谱。亚波长空间分辨率是介质热性质和探针选择性的综合函数。 !10

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