A dual-mode quantum dot laser operating in the excited state
- 5 December 2011
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 99 (23)
- https://doi.org/10.1063/1.3667193
Abstract
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.Keywords
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