InAs-based interband-cascade-lasers emitting around 7 μm with threshold current densities below 1 kA/cm2 at room temperature

Matthias Dallner; Florian Hau; Sven Hoefling; Martin Kamp

doi:10.1063/1.4907002

InAs-based interband-cascade-lasers emitting around 7 μm with threshold current densities below 1 kA/cm² at room temperature

Matthias Dallner^*, Florian Hau, Sven Hoefling, Martin Kamp

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Interband cascade lasers (ICLs) grown on InAs substrates with threshold current densities below 1 kA/cm² are presented. Two cascade designs with different lengths of the electron injector were investigated. Using a cascade design with 3 InAs quantum wells (QWs) in the electron injector, a device incorporating 22 stages in the active region exhibited a threshold current density of 940 A/cm² at a record wavelength of 7 μm for ICLs operating in pulsed mode at room temperature. By investigating the influence of the number of stages on the device performance for a cascade design with 2 QWs in the electron injector, a further reduction of the threshold current density to 800 A/cm² was achieved for a 30 stage device.

Original language	English
Article number	041108
Number of pages	4
Journal	Applied Physics Letters
Volume	106
Issue number	4
DOIs	https://doi.org/10.1063/1.4907002
Publication status	Published - 26 Jan 2015

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Hofling_2015_APL_InAs
Copyright 2015 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: Dallner, M., Hau, F., Hoefling, S., & Kamp, M. (2015). InAs-based interband-cascade-lasers emitting around 7 mu m with threshold current densities below 1 kA/cm(2) at room temperature. Applied Physics Letters, 106(4), [041108]. The article may be found at http://scitation.aip.org/content/aip/journal/apl/106/4/10.1063/1.4907002
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title = "InAs-based interband-cascade-lasers emitting around 7 μm with threshold current densities below 1 kA/cm2 at room temperature",

abstract = "Interband cascade lasers (ICLs) grown on InAs substrates with threshold current densities below 1 kA/cm2 are presented. Two cascade designs with different lengths of the electron injector were investigated. Using a cascade design with 3 InAs quantum wells (QWs) in the electron injector, a device incorporating 22 stages in the active region exhibited a threshold current density of 940 A/cm2 at a record wavelength of 7 μm for ICLs operating in pulsed mode at room temperature. By investigating the influence of the number of stages on the device performance for a cascade design with 2 QWs in the electron injector, a further reduction of the threshold current density to 800 A/cm2 was achieved for a 30 stage device.",

author = "Matthias Dallner and Florian Hau and Sven Hoefling and Martin Kamp",

note = "The authors acknowledge the financial support from the European Commission in the frame of the FP7 project “WideLase” (Grant No. 318798) Date of Acceptance: 19/01/2015",

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AU - Dallner, Matthias

AU - Hau, Florian

AU - Hoefling, Sven

AU - Kamp, Martin

N1 - The authors acknowledge the financial support from the European Commission in the frame of the FP7 project “WideLase” (Grant No. 318798) Date of Acceptance: 19/01/2015

PY - 2015/1/26

Y1 - 2015/1/26

N2 - Interband cascade lasers (ICLs) grown on InAs substrates with threshold current densities below 1 kA/cm2 are presented. Two cascade designs with different lengths of the electron injector were investigated. Using a cascade design with 3 InAs quantum wells (QWs) in the electron injector, a device incorporating 22 stages in the active region exhibited a threshold current density of 940 A/cm2 at a record wavelength of 7 μm for ICLs operating in pulsed mode at room temperature. By investigating the influence of the number of stages on the device performance for a cascade design with 2 QWs in the electron injector, a further reduction of the threshold current density to 800 A/cm2 was achieved for a 30 stage device.

AB - Interband cascade lasers (ICLs) grown on InAs substrates with threshold current densities below 1 kA/cm2 are presented. Two cascade designs with different lengths of the electron injector were investigated. Using a cascade design with 3 InAs quantum wells (QWs) in the electron injector, a device incorporating 22 stages in the active region exhibited a threshold current density of 940 A/cm2 at a record wavelength of 7 μm for ICLs operating in pulsed mode at room temperature. By investigating the influence of the number of stages on the device performance for a cascade design with 2 QWs in the electron injector, a further reduction of the threshold current density to 800 A/cm2 was achieved for a 30 stage device.

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DO - 10.1063/1.4907002

M3 - Article

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 041108

ER -

InAs-based interband-cascade-lasers emitting around 7 μm with threshold current densities below 1 kA/cm2 at room temperature

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InAs-based interband-cascade-lasers emitting around 7 μm with threshold current densities below 1 kA/cm² at room temperature