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5 March 2021 Enhancing optical output power by breaking VCSEL circular symmetry
Tomasz G. Czyszanowski, Adam Brejnak, Marcin Gębski, Adam K. Sokół, Magdalena Marciniak, Emilia Pruszyńska-Karbownik, Michał Wasiak, Jan Muszalski, James A. Lott, Ingo Fischer
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Proceedings Volume 11704, Vertical-Cavity Surface-Emitting Lasers XXV; 117040D (2021) https://doi.org/10.1117/12.2578745
Event: SPIE OPTO, 2021, Online Only
Abstract
We experimentally demonstrate and elucidate by numerical simulations that breaking circular symmetry of large apertures of vertical-cavity surface-emitting lasers (VCSELs) significantly enhances their emission properties by increasing the optical density of states. Specifically, deformed shapes of circular oxide apertures of VCSELs enhance stimulated emission and suppress undesired non-radiative recombination contributing to an increase in output optical output power of more than 60% and in quantum efficiency of more than 10%. Our example deformed VCSEL structures demonstrate that the optical density of states appears to be of high importance for conventional optoelectronic devices in accordance to the predictions of quantum electrodynamics theory.
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Tomasz G. Czyszanowski, Adam Brejnak, Marcin Gębski, Adam K. Sokół, Magdalena Marciniak, Emilia Pruszyńska-Karbownik, Michał Wasiak, Jan Muszalski, James A. Lott, and Ingo Fischer "Enhancing optical output power by breaking VCSEL circular symmetry", Proc. SPIE 11704, Vertical-Cavity Surface-Emitting Lasers XXV, 117040D (5 March 2021); https://doi.org/10.1117/12.2578745
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KEYWORDS
Vertical cavity surface emitting lasers
Optoelectronic devices
Quantum efficiency
Absorbance
Active optics
Numerical simulations
Oxides
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