Polarization recovery through scattering media.
Polarization recovery through scattering media.
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DOI：
10.1126/sciadv.1600743
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发表时间：
2017-09
期刊：
影响因子：
13.6
通讯作者：
Brasselet S
中科院分区：
文献类型：
--
作者：
de Aguiar HB;Gigan S;Brasselet S
现在表明，在强散射环境中传播后，光失去的偏振态纯度可以恢复。光偏振的控制和使用在光学科学和工程中非常广泛。尽管生命科学领域的偏振分辨成像取得了显着的发展，但由于多次散射产生的固有去偏振效应，目前尚不可能将其转换为强散射介质。我们展示了一种前所未有的现象，为强散射介质中的偏振分辨显微镜开辟了新的可能性：通过宽带波前整形实现偏振恢复。我们演示了在检测时不使用任何偏振光学器件的情况下原始注入偏振态的聚焦和恢复。为了实现分子水平的结构成像，输入偏振的任意旋转不会降低焦点的质量。我们进一步利用偏振恢复的稳健性通过散射介质对生物组织进行结构成像。我们通过偏振分辨二次谐波产生来检索胶原纤维的分子级组织信息，这是生物医学光学诊断中广泛关注的主题。最终，对这种新现象的观察为将当前基于偏振的方法扩展到强散射环境铺平了道路。
The lost polarization state purity of light is now shown to be recovered, after propagating in a strongly scattering environment. The control and use of light polarization in optical sciences and engineering are widespread. Despite remarkable developments in polarization-resolved imaging for life sciences, their transposition to strongly scattering media is currently not possible, because of the inherent depolarization effects arising from multiple scattering. We show an unprecedented phenomenon that opens new possibilities for polarization-resolved microscopy in strongly scattering media: polarization recovery via broadband wavefront shaping. We demonstrate focusing and recovery of the original injected polarization state without using any polarizing optics at the detection. To enable molecular-level structural imaging, an arbitrary rotation of the input polarization does not degrade the quality of the focus. We further exploit the robustness of polarization recovery for structural imaging of biological tissues through scattering media. We retrieve molecular-level organization information of collagen fibers by polarization-resolved second harmonic generation, a topic of wide interest for diagnosis in biomedical optics. Ultimately, the observation of this new phenomenon paves the way for extending current polarization-based methods to strongly scattering environments.
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通讯作者：
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