Broadband thermal imaging using meta-optics
Broadband thermal imaging using meta-optics
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DOI：
10.1038/s41467-024-45904-w
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发表时间：
2023-07
影响因子：
16.6
通讯作者：
Luocheng Huang;Zheyi Han;A. Wirth-Singh;Vishwanath Saragadam;Saswata Mukherjee;Johannes E. Fröch;Quentin A. A. Tanguy-Quentin-A.-A.-Tanguy-15704552;J. Rollag;R. Gibson;J. Hendrickson;Philip W C Hon;Orrin Kigner;Zachary J. Coppens;Karl F Böhringer;A. Veeraraghavan;A. Majumdar
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文献类型：
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作者：
Luocheng Huang;Zheyi Han;A. Wirth-Singh;Vishwanath Saragadam;Saswata Mukherjee;Johannes E. Fröch;Quentin A. A. Tanguy-Quentin-A.-A.-Tanguy-15704552;J. Rollag;R. Gibson;J. Hendrickson;Philip W C Hon;Orrin Kigner;Zachary J. Coppens;Karl F Böhringer;A. Veeraraghavan;A. Majumdar
亚波长衍射光学（称为元光学）已经证明了显着增强成像系统的潜力。然而，尽管令人印象深刻的演示，大多数元光学成像系统遭受强烈的色差，限制了它们的效用。在这里，我们采用逆向设计来创建在长波红外（LWIR）区域（8-12μm）工作的宽带元光学器件。通过将元原子与相位联系起来的深度学习辅助多尺度可微框架，我们最大化了元光学的调制传递函数（MTF）表面下的波长平均体积。我们的设计框架合并了本地相位工程通过元原子和全球工程的散射在一个单一的管道。我们证实了我们的设计制造和实验特性的全硅长波红外元光学。我们的工程元光学是由一个简单的计算后端，大大提高了捕获的图像质量的补充。我们实验证明了六倍的改进的波长平均Strehl比传统的双曲面超透镜的宽带成像。
Subwavelength diffractive optics known as meta-optics have demonstrated the potential to significantly miniaturize imaging systems. However, despite impressive demonstrations, most meta-optical imaging systems suffer from strong chromatic aberrations, limiting their utilities. Here, we employ inverse-design to create broadband meta-optics operating in the long-wave infrared (LWIR) regime (8-12μm). Via a deep-learning assisted multi-scale differentiable framework that links meta-atoms to the phase, we maximize the wavelength-averaged volume under the modulation transfer function (MTF) surface of the meta-optics. Our design framework merges local phase-engineering via meta-atoms and global engineering of the scatterer within a single pipeline. We corroborate our design by fabricating and experimentally characterizing all-silicon LWIR meta-optics. Our engineered meta-optic is complemented by a simple computational backend that dramatically improves the quality of the captured image. We experimentally demonstrate a six-fold improvement of the wavelength-averaged Strehl ratio over the traditional hyperboloid metalens for broadband imaging.