Ring cavity induced threshold reduction in single-mode surface emitting quantum cascade lasers

Elvis Mujagić; Michele Nobile; Hermann Detz; Werner Schrenk; Jianxin Chen; Claire F. Gmachl; Gottfried Strasser

doi:10.1063/1.3292021

Ring cavity induced threshold reduction in single-mode surface emitting quantum cascade lasers

Elvis Mujagić, Michele Nobile, Hermann Detz, Werner Schrenk, Jianxin Chen, Claire F. Gmachl, Gottfried Strasser

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

39 Scopus citations

Abstract

We present ring cavity surface emitting (RCSE) quantum cascade lasers operating at temperatures as high as 380 K and above. A reduction in threshold current density and enhanced radiation efficiency are observed as compared to Fabry-Ṕrot (FP) lasers. In continuous wave, the maximum operation temperature of RCSE lasers is 50 K higher than in FP emitters. The devices exhibit single-mode emission at a wavelength around 8μm with a side mode suppression ratio of 30 dB at room temperature. A lithographic tuning of the resonance is achieved by a variation in the grating period. The emitters exhibit a low divergent ring-shaped beam pattern with a lobe separation of ∼1.5°.

Original language	English (US)
Article number	031111
Journal	Applied Physics Letters
Volume	96
Issue number	3
DOIs	https://doi.org/10.1063/1.3292021
State	Published - 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3292021

Cite this

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title = "Ring cavity induced threshold reduction in single-mode surface emitting quantum cascade lasers",

abstract = "We present ring cavity surface emitting (RCSE) quantum cascade lasers operating at temperatures as high as 380 K and above. A reduction in threshold current density and enhanced radiation efficiency are observed as compared to Fabry-Ṕrot (FP) lasers. In continuous wave, the maximum operation temperature of RCSE lasers is 50 K higher than in FP emitters. The devices exhibit single-mode emission at a wavelength around 8μm with a side mode suppression ratio of 30 dB at room temperature. A lithographic tuning of the resonance is achieved by a variation in the grating period. The emitters exhibit a low divergent ring-shaped beam pattern with a lobe separation of ∼1.5°.",

author = "Elvis Mujagi{\'c} and Michele Nobile and Hermann Detz and Werner Schrenk and Jianxin Chen and Gmachl, {Claire F.} and Gottfried Strasser",

note = "Funding Information: The authors acknowledge the support by the Austrian projects IR-ON and ADLIS, the Austrian Nanoinitiative project PLATON, the “Gesellschaft f{\"u}r Mikro-und Nanoelektronik” GMe, the NYSTAR award and MIRTHE (NSF-ERC). ",

year = "2010",

doi = "10.1063/1.3292021",

language = "English (US)",

volume = "96",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Ring cavity induced threshold reduction in single-mode surface emitting quantum cascade lasers

AU - Mujagić, Elvis

AU - Nobile, Michele

AU - Detz, Hermann

AU - Schrenk, Werner

AU - Chen, Jianxin

AU - Gmachl, Claire F.

AU - Strasser, Gottfried

N1 - Funding Information: The authors acknowledge the support by the Austrian projects IR-ON and ADLIS, the Austrian Nanoinitiative project PLATON, the “Gesellschaft für Mikro-und Nanoelektronik” GMe, the NYSTAR award and MIRTHE (NSF-ERC).

PY - 2010

Y1 - 2010

N2 - We present ring cavity surface emitting (RCSE) quantum cascade lasers operating at temperatures as high as 380 K and above. A reduction in threshold current density and enhanced radiation efficiency are observed as compared to Fabry-Ṕrot (FP) lasers. In continuous wave, the maximum operation temperature of RCSE lasers is 50 K higher than in FP emitters. The devices exhibit single-mode emission at a wavelength around 8μm with a side mode suppression ratio of 30 dB at room temperature. A lithographic tuning of the resonance is achieved by a variation in the grating period. The emitters exhibit a low divergent ring-shaped beam pattern with a lobe separation of ∼1.5°.

AB - We present ring cavity surface emitting (RCSE) quantum cascade lasers operating at temperatures as high as 380 K and above. A reduction in threshold current density and enhanced radiation efficiency are observed as compared to Fabry-Ṕrot (FP) lasers. In continuous wave, the maximum operation temperature of RCSE lasers is 50 K higher than in FP emitters. The devices exhibit single-mode emission at a wavelength around 8μm with a side mode suppression ratio of 30 dB at room temperature. A lithographic tuning of the resonance is achieved by a variation in the grating period. The emitters exhibit a low divergent ring-shaped beam pattern with a lobe separation of ∼1.5°.

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DO - 10.1063/1.3292021

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VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

M1 - 031111

ER -

Ring cavity induced threshold reduction in single-mode surface emitting quantum cascade lasers

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