Patent ID: 9014228
Filing Date: 2015-04-21
Classification: C30B,H01S

Abstract:
1. A monolithic heterogeneous crystal comprising a first region, a second region, and a third region, the monolithic heterogeneous crystal being a large area substrate single crystal, the first, second, and third regions of the monolithic crystal including the same host material, the composition of the first region differing from the composition of the second region and the third region, the first region comprising a dopant in a concentration of greater than about 0.1 at. % of the host material of the first region, the monolithic heterogeneous crystal being formed according to a hydrothermal growth process that includes heating and pressurizing an aqueous solution held within a reactor to develop a temperature differential between a first zone of the reactor and a second zone of the reactor, the reactor containing a feedstock for the host material and a source for the dopant in the first zone and a seed crystal comprising the second region including the host material in the second zone, the second region of the seed crystal comprising a crystal lattice orientation, the aqueous solution comprising a mineralizer, the heating and pressurizing initiating growth of the first region onto the second region, the first region adopting the same crystal lattice orientation as that of the second region as the first region grows on the second region, wherein following the growth of the first region onto the second region, the first and second regions are distinguishable from one another only by the presence of the dopant in the first region with the first and second regions having the same crystal lattice orientation.