Two-Photon Microscopy with a Double-Wavelength Metasurface Objective Lens Arbabi, Ehsan ; Li, Jiaqi ; Hutchins, Romanus J. ; Kamali, Seyedeh Mahsa ; Arbabi, Amir ; Horie, Yu ; Van Dorpe, Pol ; Gradinaru, Viviana ; Wagenaar, Daniel A. ; Faraon, Andrei Abstract Publication: Nano Letters Pub Date: August 2018 DOI: 10.1021/acs.nanolett.8b01737 Bibcode: 2018NanoL..18.4943A