《科学》（20240308出版）一周论文导读
编译 | 未玖
Science, 8 MAR 2024, VOL 383, ISSUE 6687
《科学》2024年3月8日，第383卷，6687期
物理学Physics
Adaptive optical imaging with entangled photons
纠缠光子的自适应光学成像
▲ 作者：Patrick Cameron, Baptiste Courme, Chloé Vernière, Raj Pandya, Daniele Faccio & Hugo Defienne
▲ 链接：
https://www.science.org/doi/10.1126/science.adk7825
▲ 摘要：
自适应光学（AO）通过校正光学像差，颠覆了从天文学到显微学等领域的成像。然而，在无标记显微镜中，由于缺乏引导星和需要选择特定于样品和成像过程的优化度量，传统的AO面临局限性。
研究组提出了一种利用纠缠光子之间的相关性来直接校正点扩散函数的AO方法。这种无引导星方法独立于标本和成像方式。他们演示了在存在像差的情况下使用明场成像装置对生物样本进行成像，该装置使用空间纠缠光子对源进行操作。
该方法在校正特定像差方面比传统的AO表现更优，特别是那些涉及大量散焦的像差。该工作改善了无标记显微镜的AO，并有望在量子显微镜的发展中发挥重要作用。
▲ Abstract：
Adaptive optics (AO) has revolutionized imaging in fields from astronomy to microscopy by correcting optical aberrations. In label-free microscopes, however, conventional AO faces limitations because of the absence of a guide star and the need to select an optimization metric specific to the sample and imaging process. Here, we propose an AO approach leveraging correlations between entangled photons to directly correct the point spread function. This guide star–free method is independent of the specimen and imaging modality. We demonstrate the imaging of biological samples in the presence of aberrations using a bright-field imaging setup operating with a source of spatially entangled photon pairs. Our approach performs better than conventional AO in correcting specific aberrations, particularly those involving substantial defocus. Our work improves AO for label-free microscopy and could play a major role in the development of quantum microscopes.
Multimodality integrated microresonators using the Moiré speedup effect
利用莫尔加速效应的多模集成微谐振器
▲ 作者：Qing-Xin Ji, Peng Liu, Warren Jin, Joel Guo, Lue Wu, Zhiquan Yuan, et al.
▲ 链接：
https://www.science.org/doi/10.1126/science.adk9429
▲ 摘要：
高Q微谐振器是光子集成电路中不可或缺的元件，提供了几种可用的工作模式。然而，这些模式不能在制造后重新配置，因其由谐振器的物理几何形状来固定。
在这项工作中，研究组提出了一种莫尔加速色散调谐方法，使微谐振器器件能够在三种模式中的任何一种模式下工作。游标耦合环的电调谐可根据需要使用相同的混合集成设备将操作模式切换为布里渊激光器、亮微梳和暗微梳操作。
研究组演示了电信C波段的布里渊相位匹配和微梳操作。同样，通过使用单泵浦波长，可以切换操作模式。因此，这种通用设计可适用于一系列应用。该器件为集成光子电路带来了灵活的混合模式操作。
▲ Abstract：
High-Q microresonators are indispensable components of photonic integrated circuits and offer several useful operational modes. However, these modes cannot be reconfigured after fabrication because they are fixed by the resonator’s physical geometry. In this work, we propose a Moiré speedup dispersion tuning method that enables a microresonator device to operate in any of three modes. Electrical tuning of Vernier coupled rings switches operating modality to Brillouin laser, bright microcomb, and dark microcomb operation on demand using the same hybrid-integrated device. Brillouin phase matching and microcomb operation across the telecom C-band is demonstrated. Likewise, by using a single-pump wavelength, the operating mode can be switched. As a result, one universal design can be applied across a range of applications. The device brings flexible mixed-mode operation to integrated photonic circuits.
Bioresorbable shape-adaptive structures for ultrasonic monitoring of deep-tissue homeostasis
用于超声监测深层组织稳态的生物可吸收形状自适应结构
▲ 作者：Jiaqi Liu, Naijia Liu, Yameng Xu, Mingzheng Wu, Haohui Zhang, Yue Wang, et al.
▲ 链接：
https://www.science.org/doi/10.1126/science.adk9880
▲ 摘要：
监测体内平衡是获得病理生理学见解以治疗患者的一个重要方面。准确、及时地评估深层组织内稳态失调通常需要昂贵的成像技术或侵入性活检。
