Ultra-thin, zoom capable, flexible metalenses with high focusing efficiency and large numerical aperture.

ABSTRACT: The ever-growing demand for miniaturized optical systems presents a significant challenge in revolutionizing their core element - the varifocal lens. Recent advancements in ultra-thin, tunable metasurface optics have introduced new approaches to achieving zoom imaging. However, current varifocal metalens have faced challenges such as low focusing efficiency, limited tunability, and complicated designs. Here, we employ the high-contrast transmit arrays (HCTA) structures to design and fabricate a polarization-independent, single-layer flexible metalens that operates at a wavelength of 940 nm. Using a uniform stretching system, we characterized its optical performance to achieve over 60 % focusing efficiency within a 0 %-25 % stretch range, while the focal length changes align with theoretica

SUBMITTER: Shi Y 

PROVIDER: S-EPMC11636449 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature