Faculté des sciences
Texte intégral

Quantum-cascade-laser structures as photodetectors

Hofstetter, Daniel ; Beck, Mattias ; Faist, Jérôme

In: Applied Physics Letters, 2002, vol. 81, p. 2683-2685

We evaluated two different quantum-cascade-laser structures as photodetectors. The first device was a 5.3 µm two-phonon-resonance structure, and the second one a 9.3 µm bound-to-continuum transition laser. The 5.3 µm structure had a peak responsivity of 120 µA/W at 2200 cm–1 and functioned up to 325 K. On the other hand, the 9.3 µm device also... More

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    Title
    • Quantum-cascade-laser structures as photodetectors
    Author
    • Hofstetter, Daniel. Institut de Physique, Université de Neuchâtel, Switzerland
    • Beck, Mattias. Institut de Physique, Université de Neuchâtel, Switzerland
    • Faist, Jérôme. Institut de Physique, Université de Neuchâtel, Switzerland
    Document Type
    • Postprint
    Publication Date
    • 2002
    Language
    • English
    Published in
    • Applied Physics Letters, 2002, vol. 81, p. 2683-2685. American Institute of Physics (AIP)
    Other Version
    Classification
    • Physics
    OAI-PMH Identifier
    • oai:doc.rero.ch:20080509152518-ZY
    Submission No.
    • 20080509152518-ZY
    Summary
    We evaluated two different quantum-cascade-laser structures as photodetectors. The first device was a 5.3 µm two-phonon-resonance structure, and the second one a 9.3 µm bound-to-continuum transition laser. The 5.3 µm structure had a peak responsivity of 120 µA/W at 2200 cm–1 and functioned up to 325 K. On the other hand, the 9.3 µm device also worked up to 297 K but had a lower responsivity of 50 µA/W at 1330 cm–1. Since the absorption peak of these devices can be shifted by applying an external bias, we envision interesting applications in free-space optical telecommunications.