Gain and absorption characteristics of bilayer quantum dot lasers beyond 1.3 &#956;m

Mohammed A. Majid; Siming C. Chen; David T. D. Childs; H. Shahid; Robert J. Airey; Kenneth Kennedy; Richard A. Hogg; Edmund Clarke; Peter Spencer; Ray Murray

doi:10.1117/12.874214

4 February 2011 Gain and absorption characteristics of bilayer quantum dot lasers beyond 1.3 μm

Mohammed A. Majid, Siming C. Chen, David T. D. Childs, H. Shahid, Robert J. Airey, Kenneth Kennedy, Richard A. Hogg, Edmund Clarke, Peter Spencer, Ray Murray

Author Affiliations +

Proceedings Volume 7953, Novel In-Plane Semiconductor Lasers X; 795303 (2011) https://doi.org/10.1117/12.874214
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

In this paper we report on the multi-section gain and absorption analysis of strain engineered molecular beam epitaxy (MBE) grown GaAs and InGaAs capped bilayers. The InGaAs capped bilayer quantum dot (QD) lasers extends the room temperature lasing wavelength to 1.45 μm. The spectral measurement of gain demonstrates that net modal gain is achieved beyond 1.5 μm at room temperature. Analysis of the temperature and current density dependence gain characteristics of a GaAs capped bilayer sample indicate that the temperature sensitivity of threshold current around room temperature is due to phonon assisted thermal escape of carriers from the QDs.

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Mohammed A. Majid, Siming C. Chen, David T. D. Childs, H. Shahid, Robert J. Airey, Kenneth Kennedy, Richard A. Hogg, Edmund Clarke, Peter Spencer, and Ray Murray "Gain and absorption characteristics of bilayer quantum dot lasers beyond 1.3 μm", Proc. SPIE 7953, Novel In-Plane Semiconductor Lasers X, 795303 (4 February 2011); https://doi.org/10.1117/12.874214

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