Abstract
An optoelectronic integrated device composed of six heterojunction phototransistors epitaxially integrated over two buried crescent laser diodes is developed. The integrated device provides internal electro-optical coupling among constituent components. The coupling has an important role to achieve several optical functions quite appropriate for the fields of neural network and optical information processing. With a proper combination of the constituent devices, the integrated device exhibits tetra-stable set-reset function (extendable to penta-stable set-reset function) when external optical pulses are incident to the device. Physics and mechanism of the device operation are discussed in detail and the experimental results are presented.
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