美国华盛顿大学Arka Majumdar团队研究了全彩色可见成像与晶体硅元光学。该研究于2025年6月18日发表在《光：科学与应用》杂志上。

硅是红外光谱范围内半导体光学器件的常用材料，因为它成本低、生产方法发达、折射率高、透明度高。然而，由于其较大的吸收系数，特别是对于绿光和蓝光，它通常不适合在可见光范围内的应用。与直觉相反，研究组展示了超薄晶体元光学如何在可见光范围内实现全色成像。 

研究组采用了一种逆向设计方法，该方法在元光学的宽带调制传递函数下使体积最大化。除此之外，他们还演示了可见光中的偏振复用功能。这一点尤为重要，因为偏振光学需要高折射率材料，而这一特性在可见光中往往难以获得。

附：英文原文

Title: Full color visible imaging with crystalline silicon meta-optics

Author: Frch, Johannes E., Huang, Luocheng, Zhou, Zhihao, Tara, Virat, Fang, Zhuoran, Colburn, Shane, Zhan, Alan, Choi, Minho, Manna, Arnab, Tang, Andrew, Han, Zheyi, Bhringer, Karl F., Majumdar, Arka

Issue&Volume: 2025-06-18

Abstract: Silicon is a common material of choice for semiconductor optics in the infrared spectral range, due to its low cost, well-developed high-volume manufacturing methods, high refractive index, and transparency. It is, however, typically ill-suited for applications in the visible range, due to its large absorption coefficient, especially for green and blue light. Counterintuitively, we demonstrate how ultra-thin crystalline meta-optics enable full-color imaging in the visible range. For this purpose, we employ an inverse design approach, which maximizes the volume under the broadband modulation transfer function of the meta-optics. Beyond that, we demonstrate polarization-multiplexed functionality in the visible. This is particularly important as polarization optics require high index materials, a characteristic often difficult to obtain in the visible.

DOI: 10.1038/s41377-025-01888-w

Source: https://www.nature.com/articles/s41377-025-01888-w