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Appl. Phys. Lett. 93, 111109 (2008); http://dx.doi.org/10.1063/1.2985900 (3 pages)

Room temperature continuous-wave operation of InAs/InP(100) quantum dot lasers grown by gas-source molecular-beam epitaxy

S. G. Li1, Q. Gong1, Y. F. Lao1, K. He1, J. Li1, Y. G. Zhang1, S. L. Feng1, and H. L. Wang2

1State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, People’s Republic of China
2College of Physics and Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China

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(Received 22 July 2008; accepted 28 August 2008; published online 18 September 2008)

We report on the InAs quantum dots (QDs) laser in the 1.55 μm wavelength region grown by gas source molecular-beam epitaxy. The active region of the laser structure consists of fivefold-stacked InAs QD layers embedded in the InGaAsP layer. Ridge waveguide lasers were processed and continuous-wave mode operation was achieved between 20 and 70 °C, with characteristic temperature of 69 K. High internal quantum efficiency (56%) and low infinite length threshold current density (128 A/cm2 per QD layer) was obtained for the as-cleaved devices at room temperature. The lasing wavelength range between 1.556 and 1.605 μm can be covered by varying the laser cavity length.

© 2008 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 42.55.Px

    Semiconductor lasers; laser diodes

  • 42.60.By

    Design of specific laser systems

ARTICLE DATA

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

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