US 12,248,118 B2
Optical metasurface films
Martin B. Wolk, Woodbury, MN (US); Robert L. Brott, Woodbury, MN (US); Karl K. Stensvad, Eagan, MN (US); James M. Nelson, Lino Lakes, MN (US); Federico Capasso, Cambridge, MA (US); Xinghui Yin, Cambridge, MA (US); and Joon-Suh Park, Cambridge, MA (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US); and President and Fellows of Harvard College, Cambridge, MA (US)
Appl. No. 17/777,211
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US); and PRESIDENT AND FELLOWS OF HARVARD COLLEGE, A CHARITABLE CORPORATION OF MASSACHUSETTS, Cambridge, MA (US)
PCT Filed Dec. 1, 2020, PCT No. PCT/IB2020/061332
§ 371(c)(1), (2) Date May 16, 2022,
PCT Pub. No. WO2021/111300, PCT Pub. Date Jun. 10, 2021.
Claims priority of provisional application 62/942,386, filed on Dec. 2, 2019.
Prior Publication US 2022/0404525 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 1/00 (2006.01); G02B 26/06 (2006.01)
CPC G02B 1/002 (2013.01) [G02B 26/06 (2013.01); G02B 2207/101 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical metasurface film, comprising:
a flexible polymeric film having a first major surface;
a patterned polymer layer having a first surface proximate to the first major surface of the flexible polymeric film and having a second nanostructured surface opposite the first surface; and
a refractive index contrast layer comprising a refractive index contrast material adjacent to the nanostructured surface of the patterned polymer layer forming a nanostructured bilayer with a nanostructured interface, the nanostructured bilayer comprising a plurality of nanostructures disposed on the flexible polymeric film, wherein the nanostructured bilayer acts locally on an amplitude, phase, or polarization of light, or a combination thereof and imparts a light phase shift that varies as a function of position of the nanostructured bilayer on the flexible polymeric film, and the light phase shift of the nanostructured bilayer defines a predetermined operative phase profile of the optical metasurface film.