Quantum Dot Infrared Photodetectors (QDIPs)

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We are studying self-assembled quantum dots of InAs on InGaAs for application in mid-infrared photodetectors using the dots in a well type structures (D-WELL). The quantum dots infrared photodetectors (QDIPs) are based in intraband transitions as the QWIPs are. Contrary to the QWIPs, the QDIPs allow coupling of normal incident radiation. In particular, we are interested in very narrow detection lines for improved contrast and better selectivity to tell gases apart in a mixture, for instance.

Fig. 1 QDIP structure with extremely narrow linewidth at 100 meV.

The results obtained can be found in the following references:

  • Simultaneous positive and negative photocurrent response in asymmetric quantum dot infrared photodetectors.

    Alvarenga, D.; PARRA-MURILLO, C. A.; PENELLO, G. M.; Penello, G. M.; KAWABATA, R.; RODRIGUES, W. N.; MIQUITA, D. R.; SCHMIDT, W.; GUIMARA'ES, P. S. S.; PIRES, M. P.; SOUZA, P. L.; Unterrainer, K.
    Journal of Applied Physics. , v.113, p.043721 - , 2013.
  • Exceptionally Narrow-Band Quantum Dot Infrared Photodetector.

    Alvarenga, Déborah R.; Parra-Murillo, Carlos A.; Kawabata, Rudy M. S.; Guimaraes, Paulo S. S.; Unterrainer, K.; Pires, Mauricio P.; Vieira, Gustavo S.; Villas-Boas, José M.; Maialle, Marcelo Z.; MAIALLE, M. Z.; Degani, Marcos H.; Farinas, Paulo F.; Nelson, Studart SOUZA, P. L.;
    IEEE Journal of Quantum Electronics. , v.48, p.1360 - 1366, 2012.
  • Multiple-photon peak generation near the ?10 ?m range in quantum dot infrared photodetectors.

    Degani, Marcos H.; Maialle, Marcelo Z.; Farinas, Paulo F.; Studart, Nelson; Pires, Mauricio P.; Souza, Patricia L.
    Journal of Applied Physics. , v.109, p.064510 - , 2011.
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