An integrated, optically powered, optoelectronic 'smart' logic pixel for interconnection and computing applications

An architecture for optoelectronic interconnection and computing applications, based on the concept of supplying local power to several locations on a 2-D array of circuits using optical means, is described. Optical powering has the advantage of supplying power with reduced crosstalk while simplifying the layout complexity of the arrays. The concept is demonstrated using an integrated and optically powered optoelectronic smart logic pixel that operates variously as a thresholding amplifier, bistable switch/latch, and a signal inverter. The mode of operation is set by the intensity of an optical control beam, and the power is supplied by illumination of an integrated photovoltaic cell array. The circuits are integrated in the InGaAs(P) materials system, and have a bandwidth of 40 MHz, a data beam switching energy of 3.8 pJ, and an optoelectronic gain as high as 11. Analysis of circuit operation and fabrication, as well as comparisons with competing technologies for smart pixel interconnections, are discussed.>