Patent ID: 9169989
Filing Date: 2015-10-27
Classification: B82Y,C30B,F21V,G02B,H01L,Y10T

Abstract:
1. An optical element comprising: a first portion of single crystal CVD diamond material having first single substitutional nitrogen concentration; a second portion of single crystal CVD diamond material coupled to the first portion, the second portion having a second single substitutional nitrogen concentration which is lower than the first single substitutional nitrogen concentration; and an out-coupling structure formed at a surface of the optical element for increasing out-coupling of light, wherein the out-coupling structure comprises one or more of: a convex surface; a microlens array; an solid immersion lens (SIL); a plurality of surface indentations or nano-structures; a diffraction grating; a fresnel lens; and a coating; wherein the first portion is formed of a single crystal CVD diamond material having both of: a single substitutional nitrogen concentration equal to or greater than 30 ppb; and an NV wherein the first portion of single crystal CVD diamond material has both of: a single substitutional nitrogen concentration equal to or less than 5 ppm; and an NV wherein the second portion of single crystal CVD diamond material is formed of a single crystal CVD diamond material having both of: a single substitutional nitrogen concentration equal to or less than 20 ppb; and an NV further comprising one or more single photon emitters having a decoherence time T2 equal to or greater than 0.05 ms.