Optical exclusive-or element
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United States of America Patent
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-
Nov 9, 1993
Grant Date -
N/A
app pub date -
Nov 13, 1992
filing date -
Nov 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical EXCLUSIVE-OR element in which the number of basic elements is reduced which results in increased integration of the element. The optical EXCLUSIVE-OR element comprises a substrate, a first optical functional element and a second optical functional element having the same structure as that of the first optical functional element. Each of the first and second optical functional elements has a light receiving portion and a light emitting portion. The light emitting portion is formed on the light receiving portion. The light emitting portion comprises semiconductor materials having an energy gap wider than the dominant peak energy of the input light, and the light receiving portion comprises semiconductor materials having an energy gap equal to or narrower than the dominant peak energy of the input light. A first electrode is formed over the first and second optical functional elements, and has windows which allow the input light and output light to pass through. Each of the windows being formed at a position corresponding to a top surface of each of the first and second optical functional elements.
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