US 12,146,826 B2
Metasurface device for detecting optical chirality
Jennifer A. Dionne, Menlo Park, CA (US); Jack Hu, Stanford, CA (US); Michelle Solomon, Cotuit, MA (US); and Mark Lawrence, Saint Louis, MO (US)
Assigned to The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US)
Appl. No. 17/769,849
Filed by The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US)
PCT Filed Nov. 8, 2020, PCT No. PCT/US2020/059586
§ 371(c)(1), (2) Date Apr. 18, 2022,
PCT Pub. No. WO2021/092526, PCT Pub. Date May 14, 2021.
Claims priority of provisional application 62/932,959, filed on Nov. 8, 2019.
Prior Publication US 2022/0364982 A1, Nov. 17, 2022
Int. Cl. G01N 21/21 (2006.01)
CPC G01N 21/21 (2013.01) [G01N 2021/216 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A device for detecting optical chirality, the device comprising a metasurface composed of a biperiodic array of nanodisks,
wherein the nanodisks are composed of a dielectric material that is transparent and has a refractive index greater than 2 at a predetermined operational ultraviolet wavelength between 200-300 nm;
wherein the nanodisks have a width-to-height ratio tuned to produce spectral overlap of electric dipole and magnetic dipole modes of incident circularly polarized ultraviolet light;
wherein the biperiodic array is a checkerboard array, where the nanodisks have diameters d±Δ/2 such that adjacent nanodisks have diameters that differ by an offset Δ.