Gain measurements of scattering-assisted terahertz quantum cascade lasers
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Hu_Gain measurements.pdf
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Author(s)
Hu, Qing
Reno, John L.
Burghoff, David Patrick
Chan, Chun Wang Ivan
Date Issued
June 2012
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Burghoff, David, Chun Wang Ivan Chan, Qing Hu, and John L. Reno. “Gain Measurements of Scattering-Assisted Terahertz Quantum Cascade Lasers.” Appl. Phys. Lett. 100, no. 26 (2012): 261111. © 2012 American Institute of Physics
Version
Final published version
Abstract
Using terahertz time-domain spectroscopy, the gain of scattering-assisted terahertz quantum cascade lasers is measured. By examining the intersubband gain and absorption over a wide range of bias voltages, we experimentally detect energy anticrossings—revealing information about the mechanism of laser action—and compare the resonant-tunneling injection scheme to the scattering-assisted injection scheme. The temperature performance of the gain medium is also measured and discussed, and an additional intersubband transition is identified that contributes to scattering-assisted lasing action at high temperatures.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4732518
