Abstract

We report the optical characteristics of a quantum-dot laser with a metal-coated waveguide, which shows a large group index of 4.2 compared to 3.2 for an uncoated laser. Temperature-dependent measurements reveal a high characteristic temperature in the temperature range of $7°\mathrm{C}–25°\mathrm{C}$. The optical gain, refractive index change, and linewidth enhancement factor are extracted from the measured Fabry–Perot amplified spontaneous emission spectra. We use the pulse measurements to eliminate the thermal effect and obtain a low linewidth enhancement factor of 0.35.

© 2010 Optical Society of America

Metal-cavity quantum-dot lasers with enhanced thermal performance

A. Matsudaira, C.-Y. Lu, T. O’Brien, and S. L. Chuang
Opt. Lett. 37(16) 3297-3299 (2012)

Optically injected quantum-dot lasers

T. Erneux, E. A. Viktorov, B. Kelleher, D. Goulding, S. P. Hegarty, and G. Huyet
Opt. Lett. 35(7) 937-939 (2010)

Reduced linewidth enhancement factor due to excited state transition of quantum dot lasers

Peng-Fei Xu, Hai-Ming Ji, Jin-Long Xiao, Yong-Xian Gu, Yong-Zhen Huang, and Tao Yang
Opt. Lett. 37(8) 1298-1300 (2012)

Above threshold spectral dependence of linewidth enhancement factor, optical duration and linear chirp of quantum dot lasers

Jimyung Kim and Peter J. Delfyett
Opt. Express 17(25) 22566-22570 (2009)

Spontaneous decay of a single quantum dot coupled to a metallic slot waveguide in the presence of leaky plasmonic modes

Yuntian Chen, Niels Gregersen, Torben Roland Nielsen, Jesper Mørk, and Peter Lodahl
Opt. Express 18(12) 12489-12498 (2010)