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首页> 外文期刊>Journal of the Optical Society of America, B. Optical Physics >Ultrasensitive femtosecond time-resolved fluorescence spectroscopy for relaxation processes by using parametric amplification
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Ultrasensitive femtosecond time-resolved fluorescence spectroscopy for relaxation processes by using parametric amplification

机译：飞秒时间分辨荧光光谱法，用于通过参数放大实现弛豫过程

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摘要

We report the gain factor, detection limit, and linearity of a femtosecond time-resolved spectrometer for ultraweak fluorescence based on a 400 nm pumped femtosecond noncollinear optical parametric amplifier. By employing the parametric fluorescence amplifier, the time-resolved fluorescence spectra of Rhodamine 6G dye in ethanol was measured. It is proved that a good spectral fidelity has been achieved in the measurement of fluorescence spectra with this technique. The measured gain factor of this parametric fluorescence amplifier is found to be similar to 1.2 x 10(6), and the detection limit is 5.1 aJ per pulse, corresponding to 15 fluorescence photons at 580 nm. With this technique, we have acquired the transient fluorescence spectra as well as the fluorescence decay profile of CdSxSe1-x, (x=0.78) nanobelts. Our results demonstrate the feasibility of this technique as an ultrasensitive time-resolved fluorescence spectrometer. (c) 2007 Optical Society of America.
机译：我们报告了基于400 nm泵浦飞秒非共线光学参量放大器的超弱荧光的飞秒时间分辨光谱仪的增益因子，检测极限和线性度。通过使用参量荧光放大器，测量了若丹明6G染料在乙醇中的时间分辨荧光光谱。事实证明，利用该技术在荧光光谱的测量中已经实现了良好的光谱保真度。发现该参量荧光放大器的测量增益系数与1.2 x 10（6）相似，检测极限为每个脉冲5.1 aJ，对应于580 nm处的15个荧光光子。通过这种技术，我们获得了瞬态荧光光谱以及CdSxSe1-x（x = 0.78）纳米带的荧光衰减曲线。我们的结果证明了该技术作为超灵敏的时间分辨荧光光谱仪的可行性。 （c）2007年美国眼镜学会。

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