This is a scanning electron micrograph of a flat multi-level diffractive lens that is achromatic across the longwave infrared (LWIR) spectrum that has been can be used for thermal imaging. The SEM image was digitally mastered. Location: University of UtahLens fabrication: Monjurul Meem Lens design: Sourangsu Banerji, Rajesh Menon SEM image and digital mastering: Apratim Majumder Related publication: M. Meem, S. Banerji, A, Majumder, F. G. Vasquez, B. Sensale-Rodriguez & R. Menon, “Broadband lightweight flat lenses for longwave-infrared imaging,” Proceedings of the National Academy of Sciences Oct 2019, 201908447; DOI: 10.1073/pnas.1908447116
—Apratim Majumder, University of Utah, U.S.A.
01 Dec 2020