Temperature dependences of metal-clad subwavelength semiconductor lasers (MCSELs): geometric invariance and the spontaneous emission factor

Joseph S. T. Smalley; Qing Gu; Matthew Puckett; Yeshaiahu Fainman

doi:10.1117/12.2055000

7 March 2014 Temperature dependences of metal-clad subwavelength semiconductor lasers (MCSELs): geometric invariance and the spontaneous emission factor

Joseph S. T. Smalley, Qing Gu, Matthew Puckett, Yeshaiahu Fainman

Author Affiliations +

Proceedings Volume 8980, Physics and Simulation of Optoelectronic Devices XXII; 89800X (2014) https://doi.org/10.1117/12.2055000
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

We perform two analyses on temperature effects in Metal-Clad Subwavelength Semiconductor Lasers (MCSELs). Firstly, we analyze the temperature dependence of the threshold gain in the infinite waveguide approximation. We show that the dielectric layer of the semiconductor-dielectric-metal composite waveguide (CWG) becomes increasingly important as temperature increases. However, we further show that the optimal geometry of the CWG is nearly invariant with the temperature. Secondly, we relax the infinite waveguide assumption with the fully 3D finite element method, and analyze the temperature dependence of the spontaneous emission factor, β. We identify a cavity geometry that mitigates detuning between the dominant cavity mode and emission spectra. Ignoring coupling to freespace modes, we explain that the modified cavity may lead to a MCSEL with large β (~0.5) for all temperatures.

Citation Download Citation

Joseph S. T. Smalley, Qing Gu, Matthew Puckett, and Yeshaiahu Fainman "Temperature dependences of metal-clad subwavelength semiconductor lasers (MCSELs): geometric invariance and the spontaneous emission factor", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 89800X (7 March 2014); https://doi.org/10.1117/12.2055000

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