US 12,092,939 B2
Spin-entangled photon emission device
Anna Tchebotareva, Voorschoten (NL); and Peter Johan Harmsma, Vleuten (NL)
Assigned to Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's-Gravenhage (NL)
Appl. No. 17/784,518
Filed by Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's-Gravenhage (NL)
PCT Filed Dec. 11, 2020, PCT No. PCT/NL2020/050779
§ 371(c)(1), (2) Date Jun. 10, 2022,
PCT Pub. No. WO2021/118356, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 19215383 (EP), filed on Dec. 11, 2019.
Prior Publication US 2023/0023493 A1, Jan. 26, 2023
Int. Cl. G02F 1/21 (2006.01); G02F 1/225 (2006.01); H04B 10/70 (2013.01)
CPC G02F 1/213 (2021.01) [G02F 1/225 (2013.01); H04B 10/70 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A spin-entangled photon emission device comprising:
a Fabry-Pérot resonator comprising a first mirror and a second mirror facing each other; and
a diamond membrane located in a space between the first mirror and the second mirror, wherein the diamond membrane comprises a photon-source capable of emitting a photon that is entangled with a spin state of the photon source, wherein the diamond membrane has a first surface and a second surface facing each other, and wherein the first surface abuts the first mirror;
wherein the Fabry-Pérot resonator comprises a solid state optical waveguide integrated on a substrate,
wherein the solid state optical waveguide has a first end facet,
wherein the first surface of the diamond membrane is bonded to the first end facet,
wherein the first mirror is formed by a reflector on the second surface of the diamond membrane, and
wherein the second mirror is formed by a reflector located:
on a second end facet of the solid state optical waveguide, or
inside the solid state optical waveguide.