Quantum-dot nano-cavity lasers with Purcell-enhanced stimulated emission

Niels Gregersen; Troels Suhr Skovgård; Michael Lorke; Jesper Mørk

doi:10.1063/1.3697702

Quantum-dot nano-cavity lasers with Purcell-enhanced stimulated emission

Niels Gregersen, Troels Suhr Skovgård, Michael Lorke, Jesper Mørk

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Abstract

We present a rate equation model for quantum-dot light-emitting devices that take into account Purcell enhancement of both spontaneous emission and stimulated emission as well as the spectral profile of the optical and electronic density-of-states. We find that below threshold the b-factor in a quantum-dot nanolaser depends strongly on the pump. For quantum dots with linewidth comparable to that of the
cavity, we then show that an otherwise non-lasing device can lase due to Purcell enhancement of the stimulated emission. Finally, we compare the rate equation model to a microscopic model and obtain good agreement.

Original language	English
Journal	Applied Physics Letters
Volume	100
Issue number	13
Pages (from-to)	131107
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.3697702
Publication status	Published - 2012

Bibliographical note

Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 100 / Issue 13 and may be found at http://apl.aip.org/resource/1/applab/v100/i13/p131107_s1.

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AU - Skovgård, Troels Suhr

AU - Lorke, Michael

AU - Mørk, Jesper

N1 - Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 100 / Issue 13 and may be found at http://apl.aip.org/resource/1/applab/v100/i13/p131107_s1.

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AB - We present a rate equation model for quantum-dot light-emitting devices that take into account Purcell enhancement of both spontaneous emission and stimulated emission as well as the spectral profile of the optical and electronic density-of-states. We find that below threshold the b-factor in a quantum-dot nanolaser depends strongly on the pump. For quantum dots with linewidth comparable to that of thecavity, we then show that an otherwise non-lasing device can lase due to Purcell enhancement of the stimulated emission. Finally, we compare the rate equation model to a microscopic model and obtain good agreement.

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JO - Applied Physics Letters

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Quantum-dot nano-cavity lasers with Purcell-enhanced stimulated emission

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