A dual-mode quantum dot laser operating in the excited state

A dual-mode laser operating in the excited states (ESs) of a quantum dot is realized by combining asymmetric pumping and external optical feedback stabilization. In generating two single-mode emission peaks, a mode separation ranging from 1.3-THz to 3.6-THz is demonstrated over temperature. This eff...

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Bibliographic Details
Published in:Applied physics letters 2011-12, Vol.99 (23), p.231110-231110-3
Main Authors: Grillot, F., Naderi, N. A., Wright, J. B., Raghunathan, R., Crowley, M. T., Lester, L. F.
Format: Article
Language:English
Subjects:
Engineering Sciences
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Summary:A dual-mode laser operating in the excited states (ESs) of a quantum dot is realized by combining asymmetric pumping and external optical feedback stabilization. In generating two single-mode emission peaks, a mode separation ranging from 1.3-THz to 3.6-THz is demonstrated over temperature. This effect is attributed to the unique carrier dynamics of the quantum-dot gain medium via the excited state inhomogeneous linewidth coupled with a proper external control. These results are particularly important towards the development of future THz optoelectronic sources with compact size, low fabrication cost, and high performance.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3667193