James Watkins
University of Massachusetts Amherst
Scalable Fabrication of High Performance, All-Inorganic Metalenses, Waveguides and Diffractive Optics via Nanoimprint Lithography
Dae Eon Jung, Vincent J. Einck, Lucas Verrastro, Amir Arbabi, James Watkins (University of Massachusetts)
All-inorganic visible wavelength metalenses with absolute efficiencies of 75% (>90% design efficiency) were fabricated using nanoimprint lithography (NIL) with cycle times of 2 minutes. Atomic layer deposition (ALD) as a post-imprint treatment enabled tuning of the refractive index from 1.9 to 2.2 using a small number of cycles.
About James Watkins
Jim Watkins is Professor of Polymer Science and Engineering and Director of the Institute for Hierarchical Manufacturing (IHM) at the University of Massachusetts Amherst. Professor Watkins received his B.S. and M.S. degrees in Chemical Engineering from the Johns Hopkins University and his Ph.D. in Polymer Science and Engineering from UMass. The IHM supports the work of approximately 20 faculty involved in nanomanufacturing and additive manufacturing. Professor Watkins has guided the research of more than 40 Ph.D. students, has authored more than 150 papers, has been granted 15 patents, and has presented more than 225 invited lectures. He is a recipient of the Camille Dreyfus Teacher-Scholar Award and a David and Lucile Packard Foundation Fellowship for Science and Engineering. He is a fellow of the American Physical Society and the National Academy of Inventors.
