Tunability of notch angles in quantum cascade microlasers with highly deformed spiral resonators

Dongxia Qu; Richard Cendejas; Zhijun Liu; Claire F. Gmachl; Fred Towner

doi:10.1063/1.3058679

Tunability of notch angles in quantum cascade microlasers with highly deformed spiral resonators

Dongxia Qu, Richard Cendejas, Zhijun Liu, Claire F. Gmachl, Fred Towner

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4 Scopus citations

Abstract

We study the mode spectra and lasing thresholds of spiral-shaped quantum cascade lasers with a deformation in the range of 10%-45% with respect to the radius and with various notch angles. We observe that the initial lasing wavelength and the threshold of a laser are correlated with each other, and they can be jointly tuned by both the deformation coefficient and notch angle. The dependence of the cavity loss on the deformation coefficient is analyzed via the measured lasing thresholds and frequency dependent gain coefficients. Moreover, we achieve single mode emission by tuning the notch angle and deformation coefficients.

Original language	English (US)
Article number	261116
Journal	Applied Physics Letters
Volume	93
Issue number	26
DOIs	https://doi.org/10.1063/1.3058679
State	Published - 2008

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3058679

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@article{18cd4df777594b0c81539e0c4c6b6847,

title = "Tunability of notch angles in quantum cascade microlasers with highly deformed spiral resonators",

abstract = "We study the mode spectra and lasing thresholds of spiral-shaped quantum cascade lasers with a deformation in the range of 10%-45% with respect to the radius and with various notch angles. We observe that the initial lasing wavelength and the threshold of a laser are correlated with each other, and they can be jointly tuned by both the deformation coefficient and notch angle. The dependence of the cavity loss on the deformation coefficient is analyzed via the measured lasing thresholds and frequency dependent gain coefficients. Moreover, we achieve single mode emission by tuning the notch angle and deformation coefficients.",

author = "Dongxia Qu and Richard Cendejas and Zhijun Liu and Gmachl, {Claire F.} and Fred Towner",

note = "Funding Information: The authors would like to thank Grace D. Chern Metcalfe in the U. S. Army Research Laboratory for helpful discussion. This work was supported in part by MIRTHE (NSF-ERC). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

year = "2008",

doi = "10.1063/1.3058679",

language = "English (US)",

volume = "93",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "26",

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TY - JOUR

T1 - Tunability of notch angles in quantum cascade microlasers with highly deformed spiral resonators

AU - Qu, Dongxia

AU - Cendejas, Richard

AU - Liu, Zhijun

AU - Gmachl, Claire F.

AU - Towner, Fred

N1 - Funding Information: The authors would like to thank Grace D. Chern Metcalfe in the U. S. Army Research Laboratory for helpful discussion. This work was supported in part by MIRTHE (NSF-ERC). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2008

Y1 - 2008

N2 - We study the mode spectra and lasing thresholds of spiral-shaped quantum cascade lasers with a deformation in the range of 10%-45% with respect to the radius and with various notch angles. We observe that the initial lasing wavelength and the threshold of a laser are correlated with each other, and they can be jointly tuned by both the deformation coefficient and notch angle. The dependence of the cavity loss on the deformation coefficient is analyzed via the measured lasing thresholds and frequency dependent gain coefficients. Moreover, we achieve single mode emission by tuning the notch angle and deformation coefficients.

AB - We study the mode spectra and lasing thresholds of spiral-shaped quantum cascade lasers with a deformation in the range of 10%-45% with respect to the radius and with various notch angles. We observe that the initial lasing wavelength and the threshold of a laser are correlated with each other, and they can be jointly tuned by both the deformation coefficient and notch angle. The dependence of the cavity loss on the deformation coefficient is analyzed via the measured lasing thresholds and frequency dependent gain coefficients. Moreover, we achieve single mode emission by tuning the notch angle and deformation coefficients.

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U2 - 10.1063/1.3058679

DO - 10.1063/1.3058679

M3 - Article

AN - SCOPUS:58149270855

SN - 0003-6951

VL - 93

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 261116

ER -

Tunability of notch angles in quantum cascade microlasers with highly deformed spiral resonators

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