High-frequency operation of a mid-infrared interband cascade system at room temperature

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1063/1.4950700
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Name affiliation
  1. National Research Council of Canada. Information and Communication Technologies
FormatText, Article
Journal titleApplied Physics Letters
ISSN0003-6951
1077-3118
Volume108
Issue20
Article number201101
Pages1–5
SubjectCapacitance; High temperature instruments; Current density; Diffusion; Low temperature detectors
Abstract
The high-frequency operation of a mid-infrared interband cascade system that consists of a type-I interband cascade laser and an uncooled interband cascade infrared photodetector (ICIP) is demonstrated at room temperature. The 3-dB bandwidth of this system under direct frequency modulation was ∼850 MHz. A circuit model was developed to analyze the high-frequency characteristics. The extracted 3-dB bandwidth for an uncooled ICIP was ∼1.3 GHz, signifying the great potential of interband cascade structures for high-speed applications. The normalized Johnson-noise-limited detectivity of these ICIPs exceeded 10⁹ cm Hz½/W at 300 K. These results validate the advantage of ICIPs to achieve both high speed and high sensitivity at high temperatures.
Publication date
PublisherAmerican Institute of Physics
LanguageEnglish
Peer reviewedYes
NPARC number23000371
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Record modified2020-03-16
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