Broadband high-efficiency dielectric metasurfaces for the visible spectrum
Abstract
Metasurfaces are optical elements that can mimic and expand on the functionality of refractive optics with a comparatively thin and planar profile. Transmissive metasurfaces suffer from high optical loss at visible wavelengths because of currently used materials and fabrication techniques. This work introduces metasurfaces that operate across the visible spectrum with high efficiencies. As the basis of our metasurfaces, we used a common material, titanium dioxide, and a fabrication method based an atomic layer deposition that creates highly anisotropic nanostructures. The results presented here provide an important advance for realizing optical components at visible wavelengths—e.g., lenses, holograms, and phase shifters—with orders of magnitude reduction in thickness compared with traditional refractive optics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 06, 2016
- Source ID
- 10.1073/pnas.1611740113
Entities
People
- Federico Capasso
- Jaewon Oh
- Mohammadreza Khorasaninejad
- Robert C Devlin
- Wei Ting Chen
Organizations
- Air Force Office of Scientific Research
- Charles Stark Draper Laboratory
- Harvard University
- National Science Foundation
- National Science and Technology Council
- University of Waterloo