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arXiv 1707.02421physics.optics
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利用声光传输矩阵控制复杂介质中的超衍射光

Controlling light in complex media beyond the acoustic diffraction-limit using the acousto-optic transmission matrix

Ori Katz, François Ramaz, Sylvain Gigan, Mathias Fink

摘要:

用光研究复杂样品的内部结构是一项重要的任务,但由于光散射,这是一项艰巨的挑战。虽然多重散射引起的复杂光学畸变可以通过介质的散射矩阵的知识有效地消除,但是该矩阵通常是未知的,并且在所有感兴趣的点处不存在荧光或吸收探针的情况下不能以高分辨率测量。为了克服这些局限性,我们在这里介绍的声光传输矩阵(AOTM)的概念。利用超声波在复杂样品中的近无散射传播,我们非侵入性地测量超声编码的,空间分辨的光学散射矩阵。我们表明,奇异值分解分析的AOTM,获得使用单个或多个超声波束,允许控制光学聚焦超过散射介质中的声衍射极限。我们的方法提供了一个通用的框架,分析声光实验,非侵入性的,高分辨率的复杂介质的研究。

英文摘要:

Studying the internal structure of complex samples with light is an important task, but a difficult challenge due to light scattering. While the complex optical distortions induced by multiple scattering can be effectively undone with the knowledge of the medium's scattering-matrix, this matrix is generally unknown, and cannot be measured with high resolution without the presence of fluorescent or absorbing probes at all points of interest. To overcome these limitations, we introduce here the concept of the acousto-optic transmission matrix (AOTM). Taking advantage of the near scattering-free propagation of ultrasound in complex samples, we noninvasively measure an ultrasonically-encoded, spatially-resolved, optical scattering-matrix. We demonstrate that a singular value decomposition analysis of the AOTM, acquired using a single or multiple ultrasonic beams, allows controlled optical focusing beyond the acoustic diffraction limit in scattering media. Our approach provides a generalized framework for analyzing acousto-optical experiments, and for noninvasive, high-resolution study of complex media.

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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