Broadband infrared imaging governed by guided-mode resonance in dielectric metasurfaces.

ABSTRACT: Nonlinear metasurfaces have experienced rapid growth recently due to their potential in various applications, including infrared imaging and spectroscopy. However, due to the low conversion efficiencies of metasurfaces, several strategies have been adopted to enhance their performances, including employing resonances at signal or nonlinear emission wavelengths. This strategy results in a narrow operational band of the nonlinear metasurfaces, which has bottlenecked many applications, including nonlinear holography, image encoding, and nonlinear metalenses. Here, we overcome this issue by introducing a new nonlinear imaging platform utilizing a pump beam to enhance signal conversion through four-wave mixing (FWM), whereby the metasurface is resonant at the pump wavelength rather than the sig

SUBMITTER: Zheng Z 

PROVIDER: S-EPMC11387824 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature