Spontaneous long-wavelength interlevel emission in quantum-dot laser structures |
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| Authors: | L E Vorob’ev D A Firsov V A Shalygin V N Tulupenko Yu M Shernyakov A Yu Egorov A E Zhukov A R Kovsh P S Kop’ev I V Kochnev N N Ledentsov M V Maksimov V M Ustinov Zh I Alferov |
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| Affiliation: | (1) St. Petersburg State Technical University, St. Petersburg;(2) Donbass State Mechanical Engineering Academy, Kramatorsk, Ukraine;(3) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg |
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| Abstract: | Spontaneous emission has been observed for the first time as a result of interband transitions of holes and electrons between
size-quantization levels in vertically coupled quantum dots and also as a result of transitions from quantum-well states to
a quantum-dot level. The spectral range of the emission was in the far-infrared (λ≅10–20 μm). The long-wavelength emission was only recorded simultaneously with short-wavelength interband emission (λ≅0.94 μm) in InGaAs/AlGaAs quantum-dot laser structures at above-threshold currents.
Pis’ma Zh. Tekh. Fiz. 24, 20–26 (August 12, 1998) |
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