Broadband infrared imaging governed by guidedmode resonance in dielectric metasurfaces  

作　　者：Ze Zheng Daria Smirnova Gabriel Sanderson Ying Cuifeng Demosthenes C.Koutsogeorgis Lujun Huang Zixi Liu Rupert Oulton Arman Yousefi Andrey E.Miroshnichenko Dragomir N.Neshev Mary O’Neill Mohsen Rahmani Lei Xu 

机构地区：[1]Advanced Optics and Photonics Laboratory,Department of Engineering,School of Science&Technology,Nottingham Trent University,Nottingham NG118NS,UK [2]ARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS),Research School of Physics,The Australian National University,Canberra,ACT 2601,Australia [3]School of Science&Technology,Nottingham Trent University,Nottingham NG118NS,UK [4]School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China [5]School of Physics,Nankai University,Tianjin 300071,China [6]Department of Physics,Imperial College London,London SW72BW,UK [7]School of Engineering and Technology,University of New South Wales,Canberra,ACT 2600,Australia

出　　处：《Light(Science & Applications)》2024年第11期2599-2610,共12页光（科学与应用)（英文版）

基　　金：the Royal Society scholarship;G.S.acknowledges support from Biotechnology and Biological Council Doctoral Training Programme(BBSRC DTP);D.S.and D.N.N.acknowledge the support by the Australian Research Council(CE200100010 and FT230100058);L.Xu and M.Rahmani acknowledge support from the UK Research and Innovation Future Leaders Fellowship(MR/T040513/1)。

摘　　要：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 signal or nonlinear emissions.As a result,we demonstrate broadband nonlinear imaging for arbitrary objects using metasurfaces.A silicon disk-on-slab metasurface is introduced with an excitable guided-mode resonance at the pump wavelength.This enabled direct conversion of a broad IR image ranging from>1000 to 4000 nm into visible.Importantly,adopting FWM substantially reduces the dependence on high-power signal inputs or resonant features at the signal beam of nonlinear imaging by utilizing the quadratic relationship between the pump beam intensity and the signal conversion efficiency.Our results,therefore,unlock the potential for broadband infrared imaging capabilities with metasurfaces,making a promising advancement for next-generation all-optical infrared imaging techniques with chip-scale photonic devices.

关 键 词：utilizing RESONANT governed 

分 类 号：TN21[电子电信—物理电子学]