Zhdanov Alexander, Rao Satish, Fedyanin Andrey, Petrov Dmitri
Faculty of Physics, M V Lomonosov Moscow State University, Moscow, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Oct;80(4 Pt 2):046602. doi: 10.1103/PhysRevE.80.046602. Epub 2009 Oct 6.
The momentum transfer to a scatterer from fluorescence photons was detected using an optical system that permits one to simultaneously measure the radiation force exerted on and fluorescence emission from the scatterer. The core of this technique is a partially metal covered dielectric bead optically trapped in a liquid with dye molecules. Fluorescence emission from the volume that includes the bead is measured simultaneously with the Brownian motion of the bead. The perturbed motion of the bead is a result of photon momentum transfer from the fluorescence of the dye to the trapped scatterer. The bead position fluctuations indicate the presence of the fluorescence and its bleaching nature. The results demonstrate the capability of the photonic force microscopy technique to be a complement to spectroscopy in the study of optical processes.
利用一种光学系统检测从荧光光子转移到散射体的动量，该光学系统能让人同时测量施加在散射体上的辐射力以及散射体发出的荧光。这项技术的核心是一个部分金属覆盖的介电珠，它被光学捕获在含有染料分子的液体中。测量包含珠子的体积发出的荧光，同时测量珠子的布朗运动。珠子的扰动运动是光子动量从染料荧光转移到捕获的散射体的结果。珠子位置的波动表明荧光的存在及其漂白性质。结果表明，光子力显微镜技术有能力在光学过程研究中作为光谱学的补充。
