Polarization-Dependent Metasurface Enables Near-Infrared Dual-Modal Single-Pixel Sensing

Abstract

Infrared single-pixel sensing with the two most representative modes, bright-field imaging and edge-enhanced imaging, has great application potential in biomedical diagnosis and defect inspection. Building a multifunctional and miniature optical computing device for infrared single-pixel sensing is extremely intriguing. Here, we propose and validate a dual-modal device based on a well-designed metasurface, which enables near-infrared bright-field and edge-enhanced single-pixel imaging. By changing the polarization of the incident beam, these two different modes can be switched. Simulations validate that our device can achieve high-fidelity dual-modal single-pixel sensing at 0.9 μm with certain noise robustness. We also investigate the generalization of our metasurface-based device and validate that different illumination patterns are applied to our device. Moreover, these output images by our device can be efficiently utilized for biomedical image segmentation. We envision this novel device may open a vista in dual-modal infrared single-pixel sensing.

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

“…Finally, the light field will be converged through a lens and collected by a single-pixel bucket detector. Thereafter, the target image could be reconstructed by secondorder correlation function and compressed sensing algorithm [3,49]. Although metasurfaces enhance imaging resolution by precisely controlling light fields at the subwavelength scale, they have limitations in imaging of objects with large size and structural complexity.…”

“…As a unique characteristic of light, polarization has played a crucial role in metasurface, including expansion of channel capacity and improvement of imaging system [26,42,43,48]. Very recently, a polarizationdependent metasurface has been demonstrated in SPI system, in which the metasurface is an addition to the SPI system and provide polarization-dependent phase gradients for x-and ypolarized light [49]. Yet, the replacement of bulky and singlefunction elements with compact and multiple-functions metasurface remains to be explored.…”