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Mid-infrared Imaging with Undetected Light using Nonlinear Metasurfaces

使用非线性超表面利用未检测到的光进行中红外成像

基本信息

批准号：
2908754
负责人：
金额：
--
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2908754
关键词：
Mid infrared Imaging Undetected Light

项目摘要

Our team is part of the UK Quantum Imaging Hub investigating the use of quantum correlated light sources for infrared imaging. Here we are applying a method of imaging with undetected photons*, where an image is formed from photons that haven't interacted with the object in view at all! Apart from the intriguing fundamental aspect of this research, it has the practical advantage that high performance detectors in the visible, can be used to form images with other scientifically important, but technologically challenging, spectral regions - especially the mid infrared, which hosts the fingerprints of molecular vibrations. The project involves developing nonlinear optics techniques to produce photon pairs bridging the visible and mid infrared (3-12 um wavelength), where vibrational absorption bands allow the chemistry of the object to be inferred. This can be achieved with certain conventional nonlinear materials, but we are also exploring artificial nonlinear materials, known as nonlinear metasurface, which are structured at the nanoscale. The project will work closely with the National Physical Laboratory (NPL) to characterise metasurfaces in the mid infrared. The results will be combined from other IR imaging methods in the group, including sub-wavelength s-SNOM images of cells and graphene devices, and our "Digistain" IR based cancer detection technology.* Lemos et al "Quantum imaging with undetected photons" doi:10.1038/nature13586

我们的团队是英国量子成像中心的一部分，研究量子相关光源在红外成像中的应用。在这里，我们正在应用一种未检测到的光子成像方法 *，其中图像是由根本没有与可见物体相互作用的光子形成的！除了这项研究的有趣的基本方面，它还具有实用优势，即可见光中的高性能探测器可用于与其他科学上重要但技术上具有挑战性的光谱区域形成图像-特别是中红外，它承载着分子振动的指纹。该项目涉及开发非线性光学技术，以产生连接可见光和中红外（3-12微米波长）的光子对，其中振动吸收带允许推断物体的化学性质。这可以用某些传统的非线性材料来实现，但我们也在探索人工非线性材料，称为非线性超颖表面，它是在纳米级结构。该项目将与美国国家物理实验室（NPL）密切合作，在中红外线下研究超表面。这些结果将结合该小组中的其他红外成像方法，包括细胞和石墨烯设备的亚波长s-SNOM图像，以及我们的“Digistain”红外癌症检测技术。Lemos et al“Quantum imaging with undetected photons”doi：10.1038/nature13586