Infrared upconversion imaging in nonlinear metasurfaces
Infrared upconversion imaging in nonlinear metasurfaces
复制标题
非线性超表面的红外上转换成像
DOI：
10.1117/1.ap.3.3.036002
复制
发表时间：
2021-05-01
影响因子：
17.3
通讯作者：
Neshev, Dragomir N.
中科院分区：
文献类型：
--
作者：
Camacho-Morales, Rocio;Rocco, Davide;Neshev, Dragomir N.
红外成像是许多应用中的关键技术，包括夜视、自动车辆导航、光学断层扫描和食品质量控制。然而，传统的红外成像技术需要使用诸如窄带隙半导体之类的材料，这些材料对热噪声敏感并且通常需要低温冷却。我们展示了一种紧凑的全光学替代方案，在由GaAs半导体纳米天线组成的超颖表面上进行红外成像，使用非线性混频过程。我们实验上展示了短波红外波长的上转换，通过相干参量过程的和频产生。在这个过程中，目标的红外图像在超颖表面内与强泵浦光束混合，在纳米级的激光成像设备中将图像从红外转换为可见光。我们的研究结果为开发紧凑型红外成像器件提供了新的机会，可应用于红外视觉和生命科学。
Infrared imaging is a crucial technique in a multitude of applications, including night vision, autonomous vehicle navigation, optical tomography, and food quality control. Conventional infrared imaging technologies, however, require the use of materials such as narrow bandgap semiconductors, which are sensitive to thermal noise and often require cryogenic cooling. We demonstrate a compact all-optical alternative to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas, using a nonlinear wave-mixing process. We experimentally show the upconversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency generation. In this process, an infrared image of a target is mixed inside the metasurface with a strong pump beam, translating the image from the infrared to the visible in a nanoscale ultrathin imaging device. Our results open up new opportunities for the development of compact infrared imaging devices with applications in infrared vision and life sciences.