Light emitting element, image sensor and light receiving element with linearly varying waveguide index
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United States of America Patent
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Jun 23, 1992
Grant Date -
N/A
app pub date -
Aug 8, 1990
filing date -
Aug 9, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical device includes a substrate, an optical waveguide provided on a surface of the substrate, and an electroluminescence element including a first electrode layer, a first insulator layer, a light emitting layer for emitting light, a second insulator layer and a second electrode layer which are successively stacked. The light emitted from the light emitting layer is emitted from an end surface of the optical waveguide. The optical waveguide has a refractive index which increases from an outer periphery to a center portion of a cross section which is approximately parallel to the end surface, and the electroluminescence element is provided within the optical waveguide.
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