Multi-layer reflector for electroluminescent device

Details Multi-layer reflector for electroluminescent device Multi-layer reflector for electroluminescent device

1977-04-28

1978-05-30

Edlow, Martin H.

Oscillators

Relaxation oscillators

357 17, 331 945H, H01S 3300, H01S 300

Patent

active

040926591

ABSTRACT:
A reflector of optical radiation is on at least one radiation emitting facet of an electroluminescent device. The reflector includes a plurality of contiguous layers of alternating composition. The layers are of silicon and a material selected from the group consisting of aluminum oxide, magnesium fluoride and silicon dioxide. Each of the layers is approximately .lambda./4n in thickness where ".lambda." is the free space wavelength of radiation emitted from the electroluminescent device, and "n" is the index of refraction of the layer. Two of the alternating contiguous layers provide a reflector which is partially reflecting, while six of the layers provide a reflector substantially reflecting to optical radiation.

REFERENCES:
patent: 3701047 (1972-10-01), Caplan
patent: 3849738 (1974-11-01), Hakki
patent: 4001719 (1977-01-01), Krupka

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