March 2021
Vol 7, Issue 10

About The Cover

Cover image expansion

ONLINE COVER Technology that combines spectral and polarimetric imaging (SPI) in a single instrument enables scientists to find and study targets based on both their chemical and structural characteristics. But while this technology is used for a wide variety of applications, including in biomedical imaging instruments that identify cancerous cells and remote sensing tools that characterize aerosols for climate modeling, existing SPI sensors come with limitations. For example, they cannot identify all spectral and polarization information in one pixel and they exhibit poor color selectivity. To overcome the limitations of these technologies, Altaqui et al. developed a single-pixel SPI sensor inspired by the visual system of the mantis shrimp. This Stomatopod Inspired Multispectral and POLarization (SIMPOL) sensor was crafted from stacked polarization-sensitive organic photovoltaics (P-OPVs), which feature highly optimizable transmittance and intrinsic polarization sensitivity, and polymer retarder films, which enable fine-tuned polarization rotation for various wavelengths of light. The researchers demonstrated that the sensor can detect four spectral channels with a spectral resolution as high as 16.9 nanometers and can accurately reconstruct a target's chemical and structural characteristics. [CREDIT: MICHAEL BOK, LUND UNIVERSITY, SWEDEN]