US 12,306,370 B2
Thermal metasurface combining local and non- local light-matter interactions
Andrea Alù, Tenafly, NJ (US); Adam C. Overvig, Bronx, NY (US); Sander A. Mann, Brooklyn, NY (US); and Ryan Nolen, New York, NY (US)
Assigned to Research Foundation of the City University of New York, New York, NY (US)
Filed by Research Foundation of the City University of New York, New York, NY (US)
Filed on May 23, 2022, as Appl. No. 17/751,078.
Claims priority of provisional application 63/192,292, filed on May 24, 2021.
Prior Publication US 2022/0381950 A1, Dec. 1, 2022
Int. Cl. G02B 1/00 (2006.01); G02B 5/30 (2006.01)
CPC G02B 1/002 (2013.01) [G02B 5/3033 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A thermal metasurface comprising
a dielectric slab with refractive index n1,
a first plurality of pillars with asymmetric shapes arrayed with a pitch distance P wherein each ith pillar in the first plurality of pillars is oriented at an angle θi relative to a longitudinal axis of the dielectric slab;
a second plurality of pillars with asymmetric shapes displaced a distance d from the first plurality of pillars, wherein each jth pillar in the second plurality of pillars is oriented at an angle αj relative to the longitudinal axis of the dielectric slab, wherein the angle θi is different than the angle αj;
a third plurality of pillars with asymmetric shapes displaced by the pitch distance P from the second plurality of pillars, wherein each jth pillar in the third plurality of pillars is oriented at an angle αj+90° relative to the longitudinal axis of the dielectric slab; and
wherein the first, second and third plurality of pillars are disposed above the dielectric slab.