Patent ID: 8497527

Claim:
A device comprising: a two-dimensional electron gas located between a first layer and a second layer; a first active region located in a portion of the electron gas, wherein the first active region comprises an electron concentration less than an electron concentration of a set of non-active regions of the electron gas; a first controlling terminal located on the second layer and on a first side of the first active region; a second active region formed in a second portion of the electron gas, wherein the second active region comprises an electron concentration less than an electron concentration of the set of non-active regions of the electron gas; and a second controlling terminal located on the second layer on the first side of the second active region, wherein the set of non-active regions includes regions of the electron gas located directly below the first and second controlling terminals, and wherein the electron concentrations result in an electric field within the electron gas peaking in the first and second active regions on a side opposite the corresponding first and second controlling terminals during steady state operation of the device.