Imaging through nonlinear metalens using second harmonic generation

Abstract

The abrupt phase change of light at metasurfaces provides high flexibility in wave manipulation without the need of accumulation of propagating phase through dispersive materials. In the linear optical regime, one important application field of metasurfaces is imaging by planar metalenses, which enables device miniaturization and aberration correction compared to conventional optical microlens systems. With the incorporation of nonlinear responses into passive metasurfaces, optical functionalities of metalenses are anticipated to be further enriched, leading to completely new applications areas. Here, we demonstrate imaging with nonlinear metalenses that combine the function of an ultrathin planar lens with simultaneous frequency conversion. With such nonlinear metalenses, we experimentally demonstrate imaging of objects with near infrared light while the image appears in the second harmonic signal of visible frequency range. Furthermore, the functionality of these nonlinear metalenses can be modified by switching the handedness of the circularly polarized fundamental wave, leading to either real or virtual nonlinear image formation. Nonlinear metalenses do not only enable infrared light imaging through a visible detector but also have the ability to modulate nonlinear optical responses through an ultrathin metasurface device while the fundamental wave remains unaffected, which offers the capability of nonlinear information processing with novel optoelectronic devices.

References in corpus (8)

• Dielectric Metasurfaces for Complete Control of Phase and Polarization with Subwavelength Spatial Resolution and High Transmission
• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Helicity Dependent Directional Surface Plasmon Polariton Excitation Using A Metasurface with Interfacial Phase Discontinuity
• Resonantly enhanced second-harmonic generation using III-V semiconductor all-dielectric metasurfaces
• Multiwavelength polarization insensitive lenses based on dielectric metasurfaces with meta-molecules
• Nonlinear Metamaterials for Holography
• Symmetry selective third harmonic generation from plasmonic metacrystals
• Nonlinear Phase Control and Anomalous Phase Matching in Plasmonic Metasurfaces

Cited by in corpus (12)

• A broadband achromatic polarization-insensitive metalens consisting of anisotropic nanostructures
• Nonlinear imaging with all-dielectric metasurfaces
• Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography
• Asymmetric parametric generation of images with nonlinear dielectric metasurfaces
• Tunable Polarization-Multiplexed Achromatic Dielectric Metalens
• Backward phase-matched second-harmonic generation from stacked metasurfaces
• Efficient frequency conversion with geometric phase control in optical metasurfaces
• Nonlinear bicolor holography using plasmonic metasurfaces
• Spectral tuning of high-harmonic generation with resonance-gradient metasurfaces
• A wavelength and polarization selective photon sieve for holographic applications
• Nanometer-resolution 3D Tomographic and Vectorial Near-field Imaging in Dielectric Optical Resonators
• Nonlinear Mid-infrared Metasurface based on a Phase-Change Material