ISSN:
1090-6487
Keywords:
85.30.Vw
;
73.20.Dx
;
78.30.Fs
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The spontaneous emission of far-infrared radiation (λ≅10–20 μm) from diode structures with vertically coupled InGaAs/AlGaAs quantum dots is observed. This emission is due both to transitions of holes and electrons between size-quantization levels in quantum dots and to transitions from the continuum to a level in a quantum dot. It is observed only when accompanied by lasing at short wavelengths (λ≅0.94 μm) and, like the short-wavelength emission, it exhibits a current threshold. The spontaneous emission of long-wavelength radiation is also observed in InGaAs/GaAs quantum-well laser structures. This radiation is approximately an order of magnitude weaker than that from quantum-dot structures, and it has no current threshold.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.567663
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