	US 11,092,717 B2
	Meta-lenses for sub-wavelength resolution imaging
Federico Capasso, Cambridge, MA (US); Wei-Ting Chen, Cambridge, MA (US); Robert C. Devlin, Cambridge, MA (US); Mohammadreza Khorasaninejad, Cambridge, MA (US); Jaewon Oh, Cambridge, MA (US); Alexander Yutong Zhu, Cambridge, MA (US); Charles Roques-Carmes, Cambridge, MA (US); and Ishan Mishra, Cambridge, MA (US)
Assigned to PRESIDENT AND FELLOWS OF HARVARD COLLEGE, Cambridge, MA (US)
Appl. No. 16/91,104
Filed by PRESIDENT AND FELLOWS OF HARVARD COLLEGE, Cambridge, MA (US)
PCT Filed Apr. 5, 2017, PCT No. PCT/US2017/026206 § 371(c)(1), (2) Date Oct. 3, 2018, PCT Pub. No. WO2017/176921, PCT Pub. Date Oct. 12, 2017.
Claims priority of provisional application 62/397,854, filed on Sep. 21, 2017.
Claims priority of provisional application 62/318,649, filed on Apr. 5, 2016.
Prior Publication US 2019/0154877 A1, May 23, 2019
Int. Cl. G02B 1/00 (2006.01); G02B 3/08 (2006.01); G02B 5/18 (2006.01); G02B 3/02 (2006.01)

CPC G02B 1/002 (2013.01) [G02B 1/00 (2013.01); G02B 3/02 (2013.01); G02B 3/08 (2013.01); G02B 5/18 (2013.01); G02B 5/1809 (2013.01); G02B 2207/101 (2013.01)]

23 Claims

1. A meta-lens having a phase profile, comprising:

a substrate; and

a plurality of nanostructures disposed on the substrate, wherein each individual nanostructure of the nanostructures imparts a light phase shift that varies depending on a location of the individual nanostructure on the substrate, and the light phase shifts of the nanostructures define the phase profile of the meta-lens;

wherein the nanostructures include nanopillars, and the light phase shift of each individual nanopillar of the nanopillars depends on the location of the individual nanopillar on the substrate and a structure of the individual nanopillar; and

wherein the light phase shift of each individual nanopillar of the nanopillars is

where λ_dis a design wavelength of the meta-lens and f is a design focal length of the meta-lens.