Coherent light generators – Particular component circuitry – Optical pumping
Patent
1990-09-27
1992-04-07
Prenty, Mark
Coherent light generators
Particular component circuitry
Optical pumping
357 16, 357 61, 372 45, H01L 3300, H01L 29161, H01L 2924, H01S 319
Patent
active
051032716
ABSTRACT:
A semiconductor light-emitting device comprises a light-emitting layer including a pn junction formed by a plurality of In.sub.x Ga.sub.y Al.sub.l-x-y P (0.ltoreq.x, y.ltoreq.l) layers, and a light-emitting-layer holding layer consisting of an indirect transition type Ga.sub.l-w Al.sub.w As (0.ltoreq.w.ltoreq.l) provided on an opposite side to a light-outputting side. The holding layer has a sufficiently small light absorption coefficient for the light from the light-emitting layer even though its band gap is small and improves the light emission efficiency of the semiconductor light-emitting device.
REFERENCES:
patent: 5008718 (1991-04-01), Fletcher et al.
Applied Physics Letter, vol. 43, (1983) p. 1034-H. Ishiguro et al, "High Efficient GaAIAs light-emitting diodes of 660 nm with a double heterostructure on a GaAIAs substrate".
Electronics Letter, vol. 23, No. 3, (1987) p. 134-K. Iga et al, "Microcavity GaAIAs/GaAs surface-emitting laser with I.sub.th =6mA".
Hatano Ako
Izumiya Toshihide
Ohba Yasuo
Kabushiki Kaisha Toshiba
Prenty Mark
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