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arXiv 1209.4411physics.opticsphysics.bio-ph
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超分辨荧光显微术中分辨率与光子数的普适标度

Universal scaling of resolution with photon number in superresolution fluorescence microscopy

Alexander Small

摘要:

超分辨率荧光显微镜技术突破了衍射极限,使生物物理学和纳米科学中的超高分辨率成像成为可能。在实验研究的所有情况下,分辨率与测量所用光子数的某些参数的平方根成反比。然而,这种普遍存在的限制产生于不同方法中非常不同的机制,这就提出了一个问题,即它是否是一个不能被超越的基本限制,或者仅仅是迄今为止研究的技术的巧合。我们证明,在非常一般的假设,基本上包括所有的荧光显微镜的情况下,已知的分辨率限制确实是普遍的。我们的模型考虑了通过与我们的假设(1)表现出散粒噪声的光和(2)可以用速率方程建模的分子兼容的任何任意步骤序列建立图像的实验。对我们假设的详细检查表明,超过这个分辨率限制将需要使用量子光学效应,这为未来的创新指明了一条道路。

英文摘要:

Superresolution fluorescence microscopy techniques beat the diffraction limit, enabling ultra-high resolution imaging in biological physics and nanoscience. In all cases that have been studied experimentally, the resolution scales inversely with the square root of some parameter that measures the number of photons used. However, this ubiquitous limit arises from very distinct mechanisms in different approaches, raising the question of whether it is a fundamental limit that cannot be exceeded, or merely a coincidence of the techniques studied thus far. We demonstrate that, under very general assumptions that encompass essentially all fluorescence microscopy situations, the known resolution limit is indeed universal. Our model considers experiments that build up an image via any arbitrary sequence of steps compatible with our assumptions of (1) light that exhibits shot noise and (2) molecules that can be modeled with rate equations. A detailed examination of our assumptions shows that exceeding this resolution limit will require the use of quantum optical effects, pointing to an avenue for future innovation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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