Single-mode, surface-emitting quantum cascade laser at 26 μm
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Date
2024-01-22
Publication Type
Journal Article
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yes
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Abstract
We present the simulation, design, fabrication, and characterization of planarized double metal quantum cascade lasers based on InGaAs/GaAsSb. Intended for astrophysical heterodyne measurements and having the cavity embedded in benzocyclobutene, the devices are equipped with thermal bridges on either side of the ridge, in order to improve the heat dissipation. The lasers are shown to vertically emit a single mode around 26 μm in pulsed operation, with peak powers of ≈ 30 μW and a current density threshold of Jₜₕ = 3.7 kA/cm². Maximum operation temperature is around 170 K, with the maximum supported duty cycle being extended from the initial 15% to about 30% with the help of the improved thermal management technique.
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published
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Journal / series
Volume
124 (4)
Pages / Article No.
41109
Publisher
American Institute of Physics
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Date collected
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Subject
Heterostructures; Thermal analysis; Lasers; Semiconductors
Organisational unit
03759 - Faist, Jérôme / Faist, Jérôme
02205 - FIRST-Lab / FIRST Center for Micro- and Nanoscience