Breaking Acoustic Limit of Optical Focusing Using Photoacoustic-Guided Wavefront Shaping,Laser & Photonics Reviews

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Breaking Acoustic Limit of Optical Focusing Using Photoacoustic-Guided Wavefront Shaping
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-06-12 , DOI: 10.1002/lpor.202000594
Rongkang Gao ₁ , Zhiqiang Xu ₁ , Liang Song ₁ , Chengbo Liu ₁

Affiliation

Optical wavefront shaping (WFS) has been demonstrated as a powerful tool for focusing light in opaque scattering media. Photoacoustic (PA)-guided WFS, in particular, has raised a lot of interest because of its non-invasive approach of light focusing by utilizing endogenous optical absorption information inside complex samples. In general, the optical focus after PA-guided WFS is limited by the focus of the ultrasound transducer. To date, a number of approaches have been developed to tackle this problem, allowing a sub-acoustic focal spot to be achieved deep within scattering samples. This review introduces these developments in PA-guided WFS, highlighting their fundamental principles as well as their merits and limitations. Furthermore, the rules that govern the optical focusing ability of PA-guided WFS are provided, and the outlook and remaining challenges for future advances are discussed. These insights will facilitate further breakthroughs in PA-guided WFS.

中文翻译：

使用光声导波前整形打破光学聚焦的声学极限

光学波前整形 (WFS) 已被证明是在不透明散射介质中聚焦光的强大工具。特别是光声 (PA) 引导的 WFS，由于其通过利用复杂样品内的内源性光吸收信息进行光聚焦的非侵入性方法而引起了很多兴趣。通常，PA 引导 WFS 后的光学焦点受超声换能器的焦点限制。迄今为止，已经开发了许多方法来解决这个问题，允许在散射样本的深处实现亚声学焦点。本综述介绍了 PA 引导的 WFS 中的这些发展，强调了它们的基本原则以及它们的优点和局限性。此外，还提供了控制 PA 引导的 WFS 的光学聚焦能力的规则，并讨论了未来进展的前景和剩余挑战。这些见解将促进 PA 引导的 WFS 的进一步突破。

更新日期：2021-08-15

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