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

作者：Grillot F^*; Naderi N A; Wright J B; Raghunathan R; Crowley M T; Lester L F

来源：Applied Physics Letters, 2011, 99(23): 231110.

DOI：10.1063/1.3667193

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.

• 出版日期2011-12-5