Switchable Two-Dimensional AND and Exclusive OR Operation Based on Dual-Wavelength Metasurfaces

Abstract

Logic operation serves as the foundation and core element of computing networks; it will bring huge vitality to advanced information processing with its adaptation in the optical domain. As fundamental logic operations, AND and exclusive OR (XOR) operations serve a multitude of purposes, such as their ability to cooperate in enabling image processing and interpretation. Here, we propose and experimentally demonstrate a wavelength multiplexed AND and XOR function based on metasurfaces. By combining two cosine gratings with distinct frequencies and an initial phase difference of π/2, we extract the similarities and differences between two input images simultaneously by illuminating them with 445 and 633 nm wavelengths. Additionally, we explore its potential in information encryption, where overall security is enhanced by distributing distinct parts of initial information and encoded keys to different receivers. This design possesses the benefits of convenient mode switching and high-quality imaging, facilitating advanced applications in pattern recognition, machine vision, medical diagnosis, etc.

All-dielectric metasurface for polarization-multiplexed single-pixel imaging

“…In parallel, optical metasurface has become a research hotspot in the field of nanophotonics due to its extraordinary ability of precise manipulation of light at a nanoscale level [11], including the amplitude [12][13][14], phase [15][16][17], frequency [18], polarization [19] and orbital angular momentum [20]. These rich degrees of freedom in the control of light have offered metasurfaces with various functions of optical information [21][22][23][24][25][26][27][28][29][30][31], especially in imaging system [3,[32][33][34][35][36]. Besides, metasurfaces have been demonstrated to achieve high-resolution imaging [37].…”