Semiconductor luminous element and superlattice structure

Details Semiconductor luminous element and superlattice structure Semiconductor luminous element and superlattice structure

1993-04-29

1994-02-22

Epps, Georgia Y.

Coherent light generators

Particular active media

Semiconductor

257 15, 257 17, H01S 319

Patent

active

052894860

ABSTRACT:
A semiconductor luminous element has cladding layers on both sides of its active layer; and it has a multi-quantum barrier layer which is in contact with the active layer on at least a portion of at least one of the cladding layers. This multi-quantum barrier layer is formed of an alternating stack of superlattice barrier layers and superlattice well layers. The energy gap of the well layers is smaller than that of the active layer, and the quantized energy gap of the multi-quantum barrier layer is larger than the energy gap of the active layer. A superlattice structure for semiconductor devices, which confines electrons and holes, is formed out of the active layer and a cladding layer provided on at least one side of that active layer. A multi-quantum barrier layer is in contact with the active layer on at least a portion of the cladding layer. This multi-quantum barrier layer is formed of an alternating stack of superlattice barrier layers and superlattice well layers. The energy gap of the well layers is smaller than that of the active layer, and the quantized energy gap of the multi-quantum barrier layer is larger than the energy gap of the active layer.

REFERENCES:
patent: 5091756 (1992-02-01), Iga et al.
patent: 5146295 (1992-09-01), Imanaka et al.
Takagi et al., "Potential Barrier Height Analysis of AlGaInP Multi-Quantum Barrier (MQB)"; Journal of Applied Physics, vol. 29, No. 11, Nov. 1990, pp. L1977-L1980.
Shealy, "High-efficiency superlattice graded-index separate confining heterostructure lasers with AlGaAs single quantum wells", App. Phys. Lett. 51(18), May 2, 1988, pp. 1455-1457.
Iga et al., "Electron Reflectance of Multiquantum Barrier (MQB)", Electronics Letters, vol. 22, No. 19, Sep. 11, 1986, pp. 1008-1010.
Patent Abstracts of Japan, vol. 12, No. 244, (E-631) Jul. 9, 1988. (Abstract of JP63032987).
Patent Abstracts of Japan, vol. 12, No. 261, (E-636)(3108) Jul. 22, 1988. (Abstract of JP-63-46788).

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